Kaguya and LRO Image Inversion Changes, and HRSC Update (#329)

* Added adjustments for inverted kaguyaTc images

* Updated mex driver

* Updated kaguya and mex tests associated with driver updates

* Updated LRO with a flipped focal2pixel lines if the spacecraft is going backwards

* Updated lro driver to get the correct direction of the spacecraft

* Update the lro and kaguya tests

* Added a doc string to the kaguya spacecraft_direction property