Simpler RC Calibration

This is a less geeky version of RC Calibration. It is working it's way towards following the UI designer's guidelines. New things:
- Less cluttered ui to not scare away new users
- Radio display to show you what to do
- Less clicking of Next. If you move the stick to where asked, it automatically moves to the next step.
- Fewer steps. Combines detection, min/max and trim setting into a single step as much as possible. Less chance to screw up.
- Better Flaps integration. Now sets reverse for flaps according to settings.
- Channel display respects reverse setting. So indicator to the left is always stick down or stick left.

Important question on Flaps reverse: The code assume Flaps fully extended should be a high PWM value. Also Flaps trim is set to midpoint of min/max. I'm not sure if this is correct?

Here is an example visual from a step:
![screen shot 2014-10-27 at 1 24 18 pm](https://cloud.githubusercontent.com/assets/5876851/4813979/2559b3c0-5ecd-11e4-9f13-c3aca56c2983.png)