fixes issue #69
Create SplineNav.pde
Create SplineNav.h
Update Attitude.pde
Update navigation.pde
Update ArduCopter.pde
Conflicts:

	ArduCopter/ArduCopter.pde
Update APM_Config.h
Update system.pde
Update defines.h
Update AC_WPNav.cpp
Update AC_WPNav.h
Fixed an Make compile error where the else if was being found to be a function defintion.
Merge remote-tracking branch 'temp/master' into origin/master