rename and update of module Resources:D:mailingListManagerEmail to resource:D:mailingListManagerEmail
 - Added attribute holder into exception
Core+RPC: added methods getAssigned(Rich)Members
Merge pull request #240 from papperwing/resources

Rename and update of module Resources:D:mailingListManagerEmail to resource:D:mailingListManagerEmail
Merge pull request #249 from jirmauritz/getAssignedMembers

Core+RPC: added methods getAssigned(Rich)Members