implemented Lightwell
implemented Doomguard
implemented Nat Pagle

with some additional code clean up
stricter mana cost check on useOn
Implemented the Giants
Split up tests into smaller concerns.
Split test into smaller concerns
Added Hunter tests. Fixed invalid Druid test.
Created TestHeroBase and added a simple heropower for TestHero class.
Pulled minion attack tests into TestHeroBase.
Split tests into separate concerns.
Split tests into separate concerns.
Removed extraneous verification. Fixed a few bugs in the tests.
Split up test concerns and renamed Ai tests.
Split up test concerns and added a destruction test.
Split test concerns.
Change NotNull check to appropriate Equals.
Split test concerns.
Add full board test.
Better way to force minion adds.