TwistyPuzzleLib

much better rot model for Ghosts. Should be fully correct in case of mode 'not always permitted' (i.e. when mGhostAngle does not divide basicAngle). In 'always permitted' mode (Ghost Pyramid!), we still need to do some more work.

fixes to touch control of ghosts

Ghost Pyramid: tutorials, JSONs, mesh.

Correct cuts in the Ghost Pyramid

now the cuts in the Ghost Pyramid can be arbitrarily moved

improve the Ghost Pyramid

beginnings of support for Ghost Pyramid

1. fix Ghost 2x2
2. abstract out the TwistyGhostAbstract (in preparation for Ghost Pyramid & Ghost Skewb)

fix the way Ghost corners are rounded. New JSONs and meshes.

new icon for Ghost 3x3