APM_Control: Modify D and I gain scaling
APM_Control: reduce the number of parameter saves in autotune

don't save a parameter unless it has changed by 0.1%
Copter: conditional yaw fix

waypoint command was setting auto_yaw_mode when it was run after the
do-cmd
yaw_look_at_heading was being set to current heading which was
overwriting the caller's desired heading
Mission: fix example sketch after GPS lib changes
Copter: bug fix for when WP_YAW_BEHAVIOR is 0
code style: add indentation rules for makefiles

(and remove some web file types that will probably never be in APM)
Copter: bug fix for conditional_distance command

Due to a race condition, the wp_distance was not being updated before
the conditional_distance
autotest: Added McMillan airstrip at Camp Roberts to locations.txt