irlock_center_x_pos calculates the lateral x position of the marker in cm. relative to the quad
irlock_x_pos_to_latlon rotates the frame based x position to latitude/longtitude based coordinates
same case for the y position
add get_angle_to_target method
get_angle_to_target replaces pixel to position calculations
Also removed ahrs reference (now in AC_PrecLand lib), unused references
to orb and commented out parameter declaration
reduce max objects to 5
remove ahrs reference
add timeout
return true if new sample found
bug fix get_angle_to_target
remove unused get_frame
Andrew Tridgell
Jonathan Challinger
Randy Mackay
bstone04
Michael Landes