Force transaction functions to break if they modify controller state.  Do not make an assumption about the From gen_server data (it is more than a pid, so any gen_server:reply usage would have broken before, i.e., {pid(),Tag} == From, http://www.erlang.org/doc/man/gen_server.html#Module:handle_call-3).  Add integer timeouts to all the main boss_db functions. #79

Conflicts:

	src/boss_db.erl
Merge remote-tracking branch 'upstream/master' into issue_79

Conflicts:
	src/boss_db.erl
Merge