Plane : AP_L1_Control.cpp : Cleaned up calculation of damping to reduce computations
Plane : Attitude.pde : Incorporated Andrew Tridgells corrected patch for a generic output mixer.

This has been bench tested with the APM controller and appears to be mixing correctly.
Plane : APM_Control : Modified calculation of bank compensation rate offset to prevent climb if speed > max fbw speed

The previous calculation constrained the speed used to calculate the bank compensation rate offset between the min and max fbw speeds. This would result in an unwanted climb if flown above the max fbw speed (this could happen in fbw-a mode)