several changes make this not working

[limhyon]

I've found that, someone checkout current version of scan_tools,
laser_ortho_projector does not work.
I think current version of laser_ortho_projector subscribes pose instead of imu.
Can you explain why?

[idryanov]

I added the option to use the imu instead of pose for the angle. By default, the pose topic is used. To use the imu, you have to set the use_imu parameter to true, and use_pose to false. The imu topic is "imu/data", to be more in line with the ROS API (it was previously "imu").