Add Modman & Composer compatibility to Magentleman

Moved files to new location to match Magento folder structure and allow simple installation

Signed-off-by: Simon Young <simon.young@othermedia.com>
Added missing core magentleman file to Modman mapping

Signed-off-by: Simon Young <simon.young@othermedia.com>
Merge pull request #1 from simonyoung/master

Update to add Modman & Composer compatibility