Added Laravel 4 framework

Includes the latest snapshot of _Composer_.
Initialised Laravel 4 framework via _Composer_

* Initialised accordingly with documentation at: http://four.laravel.com/docs/installation
Added basic Travi-CI configuration.

* Added configuration for Travis-CI build automation system; specifies
language type and PHP version to test against. Travis defaults to
PHPUnit, which is what we desire, given Laravel's built around the test
framework.
Basic configuration of Laravel

* Switched to SQLite database.
* Added secret key for framework authentication.
* Configured APC caching for production.
Updated Travis-CI configuration

* Updated `.travis.yml` to properly initialise Laravel pre-requisite
packages over Composer prior to starting unit tests.
* Updated `README.md` to add build status icon.
Removed _Composer_ installations

* The packages installed by _Composer_ doesn't seem to translate very
well over commits; I'm deleting the `vendor` directory and
`composer.lock` file, as well as adding a `.gitignore` for future
commits. The Travis configuration has been modified to perform a
_Composer_ installation prior to building, using the snapshot version in
the project.
Merge pull request #1 from alanly/develop

Laravel 4 setup and installation complete.