PX4/Firmware — pull request #695 by DrTon (2014-02-26 17:36:59+00:00)
Title: mavlink: major rewrite, dynamic streams configuration

- Should consume less CPU, because of very careful polling
- Mavlink streams can be added / removed and configured (messages rate) in runtime, reusing uORB subscriptions if possible
- Adding new mavlink streams is more flexible using inherited classes instead of callbacks, all state information can be stored in the inherited class fields, any number of subcriptions allowed
- Mavlink streams identified by string, e.g. `add_stream("ATTITUDE", 10.0f)` (add ATTUTUDE stream at 10Hz)