Added support for Composer based deployments for CakePHP apps

Squashed commit of the following:

commit 5cdf4e473e168e6ee2a6b872922dff68ef3add36
Author: Pierre Martin <pierre@occi-tech.com>
Date:   Mon Jan 21 11:25:29 2013 +0100

    Fixed the CakePHP binary path update to use relative path and updated migrations command

commit ac71d368cb9e7d19afc5b5953ab53112b1f2ba0a
Author: Pierre Martin <pierre@occi-tech.com>
Date:   Fri Jan 18 15:44:49 2013 +0100

    Initial version of a Composer deployment for CakePHP2.x