TwistyPuzzleLib

Bump major to 8 (in accoount of the BAN6_4 - Burr Cube - where scrambling woudn't work with version 7)

separate the 'isSolved' part from TwistyObject

Make the JSON reader capable of handling possible future 'BAN*_*' objects.

BAN5_4 and BAN6_4: fix creating their signatures (improper signatures --> wrong scrambling type 2!)

Minor.

Make it possible to (fully!) read version 6 JSONs - some users might have Pyraminx Duo v. 6 already downloaded!

We need to support reading from earlier JSONs. Support v. 6 (partially - only the objects which do not have the new in v. 7 algorithms & edges - i.e. locally created bandaged cuboids)

Bugfixes

Produce new JSONs files (version 7, with new scrambling method)

Move scrambling to a new model where there are spearete scrambling 'algorithms' and 'edges' of the scrambling graph.
Now each edge can contain a whole algorithm, i.e. a sequence of moves leading from state to state, which permits construction of scrambling for more complicated bandaged objects such as the AI cube....