Beta 0.3

CHANGES TO CONQUEST.JAVA
Made toggleMoveCountButtonState have 2 parameters, one for moving
buttons and one for upgrade buttons.
Added getSelectedUnit() method. Returns unit number of the unit
currently selected.
Added more comments.
Added disableAttackMode().
Rewrote attackMode().
Added attackUnit(). Not yet functional.

CHANGES TO CONQUESTMAP.JAVA
setGridOccupied now catches IndexOutOfBoundsException instead of general
Exception.

CHANGES TO CONQUESTCOMBAT.JAVA
Rewrote ConquestCombat.java due to too many undocumented bugs and
issues. Backed up old version as ConquestCombatOld.java.