Adding Italian translations from fratellodallaluna

git-svn-id: http://plugins.svn.wordpress.org/bp-group-hierarchy/trunk@817003 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fix garbage from git; change remove_action call to remove_filter for symmetry

git-svn-id: http://plugins.svn.wordpress.org/bp-group-hierarchy/trunk@817011 b8457f37-d9ea-0310-8a92-e5e31aec5664
Merge branch 'master' of github.com:ddean4040/BP-Group-Hierarchy