Add Telekom Srbija to providers list

git-svn-id: http://csipsimple.googlecode.com/svn/trunk/CSipSimple@2103 9f815046-5998-e9c0-b7e2-ac03a23edfa4
Update translations

git-svn-id: http://csipsimple.googlecode.com/svn/trunk/CSipSimple@2104 9f815046-5998-e9c0-b7e2-ac03a23edfa4