AC_AttControl: ACRO fixes
AC Acro and Sport: Angle limit code update
Copter: simplify get_angle_targets_for_reporting
AC_AttControl: rename most methods
TradHeli: integrate AttControl method name changes
Copter: integrate AttControl method name changes
Copter: remove accel calibration from cli

Also remove compass, flight mode, optical flow, radio and ch6 tuning
knob setup from cli to free up 3.5k of flash
AutoTest: adjust copter CIRCLE_RADIUS to 3000
AC_PID: results returned as float
AC_PID: add AC_P controller

Used for stabilize angle controllers, alt hold and loiter
AC_WPNav: remove AC_PID include

This is no longer required with introduction of PosControl lib
AC_Circle: remove AC_PID include

This is no longer required with introduction of PosControl lib
AC_PosControl: replace APM_PI with AC_P
AC_AttControl: replace APM_PI with AC_P
AC_AttControlHeli: replace APM_PI with AC_P
Copter: replace APM_PI with AC_P

Saves about 90bytes of RAM
AC_AttControl: fix example sketch
AC_Fence: fix example sketch
AC_Sprayer: fix example sketch
AC_WPNav: fix example sketch