Converted Paladin cards to the new battlecry system
Almost all class cards now use the new battlecry system.

There is a problem with some battlecries whose amount isn't constant.
For example, the amount that a Blood Knight grows depends on the
number of divine shields present, and there is no way to represent that
currently.  This will be worked on.
Converted more minions to the new Battlecry system.  Implemented some GvG cards.
Merge pull request #15 from danielyule/master

Merge