Fixing submodule issue

I don't know if anyone else has this error, but I cannot set my branch as master and access the actionbarsherlock submodule unless this fix is in.

Removing this error: No submodule mapping found in .gitmodules for path 'contrib/ActionBarSherlock'

fix found here: http://stackoverflow.com/questions/14720034/no-submodule-mapping-found-in-gitmodules-for-path