PHP-INTL on Ubuntu for CakePHP 3 and PHP 7

I opted for CakePHP version 3 for a new project I am working on. Before starting the project I thought I would play around with the framework a bit. I chose Composer as the installation method. I ran the following command build a project called ctest.

composer create-project --prefer-dist cakephp/app ctest

I recieved the following errors and feedback.

Installing cakephp/app (3.3.3)
  - Installing cakephp/app (3.3.3)
    Downloading: 100%         

Created project in ctest
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - cakephp/cakephp 3.3.8 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.7 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.6 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.5 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.4 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.3 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.2 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.1 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.0-beta3 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.0-beta2 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.0-beta requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.0-RC1 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - cakephp/cakephp 3.3.0 requires ext-intl * -> the requested PHP extension intl is missing from your system.
    - Installation request for cakephp/cakephp 3.3.* -> satisfiable by cakephp/cakephp[3.3.0, 3.3.0-RC1, 3.3.0-beta, 3.3.0-beta2, 3.3.0-beta3, 3.3.1, 3.3.2, 3.3.3, 3.3.4, 3.3.5, 3.3.6, 3.3.7, 3.3.8].

  To enable extensions, verify that they are enabled in those .ini files:
    - /etc/php/7.0/cli/php.ini
    - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
    - /etc/php/7.0/cli/conf.d/10-opcache.ini
    - /etc/php/7.0/cli/conf.d/10-pdo.ini
    - /etc/php/7.0/cli/conf.d/15-xml.ini
    - /etc/php/7.0/cli/conf.d/20-calendar.ini
    - /etc/php/7.0/cli/conf.d/20-ctype.ini
    - /etc/php/7.0/cli/conf.d/20-curl.ini
    - /etc/php/7.0/cli/conf.d/20-dom.ini
    - /etc/php/7.0/cli/conf.d/20-exif.ini
    - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
    - /etc/php/7.0/cli/conf.d/20-ftp.ini
    - /etc/php/7.0/cli/conf.d/20-gd.ini
    - /etc/php/7.0/cli/conf.d/20-gettext.ini
    - /etc/php/7.0/cli/conf.d/20-iconv.ini
    - /etc/php/7.0/cli/conf.d/20-json.ini
    - /etc/php/7.0/cli/conf.d/20-mbstring.ini
    - /etc/php/7.0/cli/conf.d/20-mcrypt.ini
    - /etc/php/7.0/cli/conf.d/20-mysqli.ini
    - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
    - /etc/php/7.0/cli/conf.d/20-phar.ini
    - /etc/php/7.0/cli/conf.d/20-posix.ini
    - /etc/php/7.0/cli/conf.d/20-readline.ini
    - /etc/php/7.0/cli/conf.d/20-shmop.ini
    - /etc/php/7.0/cli/conf.d/20-simplexml.ini
    - /etc/php/7.0/cli/conf.d/20-soap.ini
    - /etc/php/7.0/cli/conf.d/20-sockets.ini
    - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
    - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
    - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
    - /etc/php/7.0/cli/conf.d/20-tokenizer.ini
    - /etc/php/7.0/cli/conf.d/20-wddx.ini
    - /etc/php/7.0/cli/conf.d/20-xmlreader.ini
    - /etc/php/7.0/cli/conf.d/20-xmlwriter.ini
    - /etc/php/7.0/cli/conf.d/20-xsl.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

I resolved all of these by installing one extension; intl (Internationalization Functions).

sudo apt-get install php-intl

Once php-intl has been installed I removed the the ctest directory and reinstalled with the following feedback.

sudo rm -fR ctest
composer create-project --prefer-dist cakephp/app ctest
Installing cakephp/app (3.3.3)
  - Installing cakephp/app (3.3.3)
    Loading from cache

Created project in ctest
Loading composer repositories with package information
Updating dependencies (including require-dev)
  - Installing aura/installer-default (1.0.0)
    Downloading: 100%         

  - Installing cakephp/plugin-installer (0.0.15)
    Downloading: 100%         

  - Installing cakephp/chronos (1.0.0)
    Downloading: 100%         

  - Installing mobiledetect/mobiledetectlib (2.8.24)
    Downloading: 100%         

  - Installing psr/http-message (1.0.1)
    Downloading: 100%         

  - Installing zendframework/zend-diactoros (1.3.7)
    Downloading: 100%         

  - Installing psr/log (1.0.0)
    Loading from cache

  - Installing aura/intl (1.1.1)
    Downloading: 100%         

  - Installing cakephp/cakephp (3.3.8)
    Downloading: 100%         

  - Installing symfony/yaml (v3.1.6)
    Downloading: 100%         

  - Installing symfony/debug (v3.1.6)
    Loading from cache

  - Installing symfony/polyfill-mbstring (v1.3.0)
    Downloading: 100%         

  - Installing symfony/console (v3.1.6)
    Downloading: 100%         

  - Installing symfony/filesystem (v3.1.6)
    Downloading: 100%         

  - Installing symfony/config (v3.1.6)
    Downloading: 100%         

  - Installing robmorgan/phinx (v0.5.3)
    Downloading: 100%         

  - Installing cakephp/migrations (1.6.3)
    Downloading: 100%         

  - Installing jakub-onderka/php-console-color (0.1)
    Downloading: 100%         

  - Installing jakub-onderka/php-console-highlighter (v0.3.2)
    Downloading: 100%         

  - Installing dnoegel/php-xdg-base-dir (0.1)
    Downloading: 100%         

  - Installing nikic/php-parser (v2.1.1)
    Downloading: 100%         

  - Installing symfony/var-dumper (v3.1.6)
    Downloading: 100%         

  - Installing psy/psysh (v0.7.2)
    Downloading: 100%         

  - Installing jdorn/sql-formatter (v1.2.17)
    Downloading: 100%         

  - Installing cakephp/debug_kit (3.4.1)
    Downloading: 100%         

  - Installing cakephp/bake (1.2.8)
    Downloading: 100%         

cakephp/app suggests installing markstory/asset_compress (An asset compression plugin which provides file concatenation and a flexible filter system for preprocessing and minification.)
cakephp/app suggests installing phpunit/phpunit (Allows automated tests to be run without system-wide install.)
cakephp/app suggests installing cakephp/cakephp-codesniffer (Allows to check the code against the coding standards used in CakePHP.)
symfony/console suggests installing symfony/event-dispatcher ()
symfony/console suggests installing symfony/process ()
symfony/var-dumper suggests installing ext-symfony_debug ()
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to work.)
cakephp/debug_kit suggests installing ext-sqlite (DebugKit needs to store panel data in a database. SQLite is simple and easy to use.)
Writing lock file
Generating autoload files
> Cake\Composer\Installer\PluginInstaller::postAutoloadDump
> App\Console\Installer::postInstall
Created `config/app.php` file
Set Folder Permissions ? (Default to Y) [Y,n]? y
Permissions set on /var/www/ctest/tmp/cache
Permissions set on /var/www/ctest/tmp/cache/models
Permissions set on /var/www/ctest/tmp/cache/persistent
Permissions set on /var/www/ctest/tmp/cache/views
Permissions set on /var/www/ctest/tmp/sessions
Permissions set on /var/www/ctest/tmp/tests
Permissions set on /var/www/ctest/tmp
Permissions set on /var/www/ctest/logs
Updated Security.salt value in config/app.php