Fixed bug in several unit tests in which iterator was being modified.

git-svn-id: svn://graphite/hackamore/trunk/Hackamore@155 57787f05-46dc-4277-aca0-fea81b7b9c9c
Serializer now shuts down thread at exit instead of just in dtor.

git-svn-id: svn://graphite/hackamore/trunk/Hackamore@156 57787f05-46dc-4277-aca0-fea81b7b9c9c