- Added PowerScaling to RenderableVolumeGL and RenderableFieldlines
- Removed the use of volumeraycasterbox since it used FBO and textures
which was not used anymore.
- Added a simple box implementation to RenderableVolumeGL that can have
PowerScaled vertex positions
TODO: The #include command needs to be extended in some way since the
FieldLines passthrough shader can't access the PowerScaled includes in a
good way.
- Added support for volume caching
- Fixed bug when moving camera in the direction or the origin causing
position lock
- Fixed camera being to only being affected on SGCT_PRESS and
SGCT_REPEAT
