Send back core translation information to the API. Update wp_get_installed_translations() to work with core translations. see #18200.



git-svn-id: http://develop.svn.wordpress.org/trunk@25652 602fd350-edb4-49c9-b593-d223f7449a82
Remove inaccurate @return value from remove_role(). props tivnet. fixes #25450.

git-svn-id: http://develop.svn.wordpress.org/trunk@25653 602fd350-edb4-49c9-b593-d223f7449a82