Added new RowSetTransformer.php
Squashed 'subtree/Pimple/' content from commit 90b4710

git-subtree-dir: subtree/Pimple
git-subtree-split: 90b4710f115766d12e1a579b816c0974887b87a7
Merge commit 'e96887a3f50642b47a36c2775d0d44e8c1727b9b' as 'subtree/Pimple'
Made changes to use Pimple in a subtree with a wrapper.