More neutral cards and test coverage

Still have issues with Corruption and Spiteful Smith, someone who is wiser will probably have to figure those out.
Added logic for mana filters so wisp still costs 1 even if you have a summoning portal on the field.
If someone wants to tackle Jaraxxus, go for it.  
If someone has an easy way to do adjacent battlecries (Defender of Argus, Void Terror, etc.), I'm not sure how to do those.