MokshaHub improvements
MokshaHub improvements

- Dynamically load DataStreams from the `moksha.stream` entry point
- Run each consumer callback in a new thread
- Robustify our exception handling when dealing with our AMQPHub
- Ensure to stop all datastreams when shutting down
- Remove a bunch of unnecessary stuff.
- Create a dumb MokshaConsumer
- Use our new trace decorator, to help debug.

mokshaproject/moksha,ralphbean/moksha,pombredanne/moksha,mokshaproject/moksha,ralphbean/moksha,mokshaproject/moksha,pombredanne/moksha,lmacken/moksha,mokshaproject/moksha,pombredanne/moksha,ralphbean/moksha,pombredanne/moksha,lmacken/moksha,lmacken/moksha