Export camera trigger locations and orientations

Hi

currently qgc do geotag images automaticly , but it is good that we can export all camera trigger locations and orientation (roll , pitch,yaw) from log and save in a file. by this way we can edit positions manualy .

The trigger locations are logged in the camera_capture topic. You can either write a python script using https://github.com/PX4/pyulog or use its ulog2csv command line tool to get the messages.