Update Ghoul repository

Print out the number of warnings, errors, and fatal errors that happened during initialization and each frame after
Updated to new Ghoul version

Correctly allow '/' character in SceneGraph description files

Use correct PlutoProject path instead of previous PlutoProjectionHybrid
Updated Ghoul version

Untabify more files

Remove outdated PlutoProjection module

Move newhorizons scene modules into subdirectories

Adapt New Horizons kernels to global switch between accurate and publicly avaiable kernels

Add a data directive to the plutoprojection that will download the New Horizons LORRI images

Adding function to OpenSpace that returns the license header

Make use of automatic conversion and swizzling of textures