Draft of new feature: canplayfromgraveyard

this will allow playing cards from graveyard
examples: tbd
Fixed bug in alternative cost when playing lands
Test for keyword "CanPlayFromGraveyard"

Also added card [Crucible of Worlds] as example of it.
Added [Yawgmoth's Will]
Fixing Yawgmoth's will
Merge pull request #574 from WagicProject/feature/play-from-grave

Feature/play from grave