Save highscores to file with mouse tracking info about minegauler HOT 1 OPEN

There are a number of approaches that can be taken:

1. Store the cell updates and mouse movement
2. Store the left/right/both mouse interactions that have an effect, and mouse movement
3. Store all left/right/both mouse clicks and movement

The above are in order of least -> most effort to reproduce the 'video', but also in order of least -> most accuracy, e.g. in the first case it's hard to reproduce the face state and mines remaining, and in the last case (raw input) everything can be fully reproduced but requires a controller to be wired up in the 'video' reproduction.

I originally went for option 2 (17c9e85), but then switched to option 1 for simplicity of creating the playback (555a8c1).

I now think we should opt for full accuracy, i.e. option 3. The current implementation should be disabled until this is completed [DONE].

Notes on options 3:

• If changes are made to any of the logic (e.g. how cells are displayed) then the playback will be different to how it looked originally (not a true video)
• Should be a more backwards compatible storage format, albeit with the above caveat
• Not compatible with either of the other options' storage format

from minegauler.