UF-130 renamed content_types to uf_content types

+Renamed content_types to uf_content_types in feature files
+modified skeleton.install to uf_content_types
+enabled feature uf_content_types
+updated feature uf_content_types

tested w/ rebuild.sh and drug…all seems fine 
note: for some reason Menus feature state is OVERRIDDEN…not sure if this is a problem or not