Revert "The requirejs processor will now live in it's own gem"

This reverts commit 9c0522e02b2e375007083da29ae016a21ecd07ea.
Revert "Yuicompressor will from now on live in it's own gem"

This reverts commit c826ef734b63fd60c4af021ece6290a199124d04.
Revert "Move requirejs test to the appropriate gem"

This reverts commit 67de0c0b73e31e46039e8815399b631a0d166014.