fixes leak of GenericThread and also fixes crash in octree servers on client disconnect
removed dead code
Merge branch 'master' of git://github.com/worklist/hifi into generic_thread_fix
fixed comment that erroneously said wait when it should have said quit
Merge pull request #1553 from ZappoMan/generic_thread_fix

fixes leak of GenericThread and also fixes crash in octree servers on client disconnect