Added a wand.

Added a wand of leech life which uses 12 mana (player now temp starts at
20 mana and not 1), modified how mana levelling works and added
placeholder images for the wand and its' bolt.
Minor changes.

Implemented natural spawning for mobs, fixed NPE where a mob would walk
into a leech life projectile and then it would try to move in the same
tick, changed mana regen mechanic to be quicker with a higher mana cap,
changed the vampiric wand to have its' type discovered on use and not
equip and made stairs not say the "can't walk into me" message when mobs
walk into it.
File didn't commit.
Compiled jar.

Game version is now alpha 2.
Stair fix.

Removed useless tile and fixed the stair messages again.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Roguelike/src/org/tilegames/hexicube/topdownproto/Game.java
	Roguelike/src/org/tilegames/hexicube/topdownproto/map/TileLadder.java
Smooth movement on LeechBolt
rename movement transition variables
Don't draw offscreen tiles
Resolution independence