[4.3] CLI Installer

- [x] Install Newscoop from cli

```
php application/console newscoop:install --help
Usage:
 newscoop:install [--fix] [--database_server_name[="..."]] [--database_name[="..."]] [--database_user[="..."]] [--database_password="..."] [--database_server_port[="..."]] [--database_override] [alias] [demo_template] [site_title] [user_email] [user_password]

Arguments:
 alias                   Newscoop instance alias (default: "newscoop.dev")
 demo_template           Choose demo publication from: "quetzal, rockstar, the_new_custodian, no_demo" (default: "quetzal")
 site_title              Publication name (default: "Newscoop newspaper")
 user_email              Admin email (default: "admin@newscoop.dev")
 user_password           Admin user password (default: "password")

Options:
 --fix                   If set we will try to fix chmods
 --database_server_name  Database host (default: "localhost")
 --database_name         Database name (default: "newscoop")
 --database_user         Database user (default: "root")
 --database_password     Database password
 --database_server_port  Database server port (default: "3306")
 --database_override     Override existing database
```
- [x] Configure travis for API behat tests
- [x] Provide console command to create api client ( + for testing)
- [x] Adjust installer services
- [x] Remove Cron class
- [x] Move fixer.php from installer to scripts
- [x] First phpsepc2 tests