Third party modules need to be registered into inkycal before they can be used. For this, the function _add_module (and _remove_module) have been added.
These functions make the necessary changes to the init file in /inkycal and /inkycal/modules.
The image will only be rotated while rendering on the Display, i.e. when render = True.
Images saved in /Inkycal/images will not be affected by this change to allow developers to see the image wihtout having to flip the images manually
