Make web socket handlers more robust to bad code by registering them
when the worker starts, so that if they crash, they get restarted and
reregistered.

Conflicts:

	src/boss/boss_service_worker.erl
Merge pull request #203 from davidw/websocket_restart

Make web socket handlers more robust to bad code by registering them
rebar.config should not use 'tag' to reference revisions: https://github.com/rebar/rebar/wiki/Dependency-management