Adding slappableConditions() to RatSlapGame

slappableConditions (basically isSlappable) returns a boolean as to
whether or not the pile is, at that moment, slappable.
Renamed slappableConditions() to isSlappable() and var isSlappable to slapAllowed
Merge branch 'master' of https://github.com/johanss4/KardKit

Conflicts:
	js/RatSlapGame.js
Merge branch 'master' of https://github.com/johanss4/KardKit

Conflicts:
	js/RatSlapGame.js