Now using JARUtil from dhutils
SQL tables now prefixed with "chesscraft_" by default.
Prefix can be changed in config (may not be blank)
Existing tables will be renamed to prefixed version.
Allows co-existence with Checkers results tables in same DB instance.
Merge branch 'master' of ssh://github.com/desht/ChessCraft

Conflicts:
	src/main/java/me/desht/chesscraft/listeners/ChessFlightListener.java
import cleanup