Merge pull request #308 from jaredbischof/master

Version update
Merge pull request #311 from jaredbischof/master

Minor bug fix.
Merge pull request #312 from jaredbischof/master

Added return of clients to user with read permissions on associated clientgroup.
Merge
Making copy of clientMap to avoid nil pointer.  Also, returning error when client tries to checkout workunit and client is not registered.
Version 0.9.10