Swipes on instance level instead of creature level

[PieterVdc]

currently only meele has a swipe, and thus only 1 is needed, but if it were on instance level, spells could use unique sprites for each as well

also look if transparancy modes could be changed, and if others make sense to add

[Loobinex]

Currently though, each unit has a different swipe on the same index,... say, the reaper swings a scythe and the warlock a staff,... it does not seem very efficient if we'd need to add 7 different melee attacks just for the different swipes.

[PieterVdc]

hmm could do a combo, have a default on creature level that could be overridden