pull out some move data fetching to separate class
add methods to quickly fetch if the move is learnable via that method
eventual plan is this:
replace
'fetch all possible moves then look within' move validation
with:
'peek if learnable, and get info how' move validation
advantages:
- returns game the move was learned in and the level (if appropriate)
- infinitely less object creation (garbage collection)
- only looks for a given move, doesn't have to fetch everything before
checking
- faster than full fetch, can be made even faster by optimizing lookups.
subject to change :)
