Alpha 0.2

First more or less full release of the pack. Balancing is very preliminary, tutorial doesn't work yet.

Changes from v0.1:

• Higher-level mobs are now included
• Number of kills required to progress to harder mobs is now determined by Difficulty setting and number of active teams
• Scoring can now be set to Flat (1 point for every mob) or Progressive (1/3/10 points depending on mob level)
• There's now a boss bar showing the game time