MMMMMMMagic update

This is a great idea, I'd love to see this working and am willing to help.

In a way we could describe this as storing raw AP gained.

For peer review, one issue I could think of:
Two Espers can teach the same spell, this means computing all espers to realize a single spell learning status%
Another solution to this problem is to ignore it, so if you already learnt 10% of a cure from an Old Esper you will start at 0% for cure on the Newly equipped Esper.
This will be an issue to consider for the Menu Magic list aswell unless you would skip showing learning progress in that list.

Another similar cool system could store AP and allowing the characters to spend it to learn stuff. That kind of system could easily be derived if the one above is implemented.