Burrowing Badger Critter Added

Added a badger critter sprite to the pack for an isometric RPG or adventure game. The sprite is 32 pixels high, and the sheet is sliced into 42x32 pixel cells.  The following animations are included in all the 4 isometric directions NE NW SE SW:

• 9-frame walk 
• 22-frame idle
• 25-frame burrow
• 5-frame tunnel 
• 13-frame unburrow