CORE+RPC: fixes for ResourcesTags

 - added javadoc for ResourcesTags methods in RPC
 - added test in core for some ResourcesTags methods
 - fixed SQL in selecting assigned tags from resource
Merge pull request #54 from zlamalp/fix_tags

CORE+RPC: fixes for ResourcesTags
GUI: fixed services selection when creating service destinations
Merge pull request #55 from zlamalp/fix_facility

GUI: fixed services selection when creating service destinations
GUI: fixed redirection to targetexisting on app form
Merge pull request #57 from zlamalp/app

GUI: fixed redirection to targetexisting on app form
Registrar: changed InternalErrorException to RegistrarError

 - changed type of thrown exception for better handling in GUI
Merge pull request #58 from zlamalp/reg

Registrar: changed InternalErrorException to RegistrarError
GUI: allow search through VO members to group admin

 - when adding new member to group allow to list/search all vo members
Merge pull request #59 from zlamalp/member

GUI: allow search through VO members to group admin
GUI: fixed mail regex for app form

 - do not check max length of TLD, only min >= 2
Merge pull request #60 from zlamalp/gui

GUI: fixed mail regex for app form
Attr. modules: unixGroupName can work without GID

Now you can set unixGroupName without unixGID if unixGIDNamespace isn't
set on facility.