Add melee attack using SAT hit box.

Signed-off-by: suicidepills <atom.mac@gmail.com>
Remove unused SAT.Response object.

Signed-off-by: suicidepills <atom.mac@gmail.com>
Merge branch 'master' of https://github.com/suicidepills/hack-n-slash-sprint

Conflicts:
	js/entities/character-factory.js

Signed-off-by: suicidepills <atom.mac@gmail.com>