Adding Excalibur tome and battle animation
Adding critical hit animations for Wyvern Lord and Sage, as well as hooking them up
Adding castle level for demo
Merge pull request #40 from DrkSephy/master

Adding new level for demo
Moved terrain detection layer on maps/levels to lowest layer (to prevent interfering with other tilesheets).
Fixed undefined terrains in big castle map. Manually positioned main player (in code) based on map layout.
Merge remote-tracking branch 'upstream/master'