Add images and broken implementation of stages
sad life
Switching between board and evolution card works
Fix stages -- made a main stage
Remove some commented code, still need to fix evolution card logic
Groups now work as Rachel intended
Merging with rswag branch
Minor code cleanup
Merge branch 'rswag' of https://github.com/cjgendron/beaver-evolution into rswag

Conflicts:
	assets/src/board.js