Alpha 0.7

CHANGES TO CONQUEST.JAVA
Added JLabel lblCurrentSelectedUnit to display to the player which unit
is currently selected. Added appropriate parameters to the label.
Added move button greying-out mechanic to checkPossibleMoveDirections()
method. Calls the checkGridOccupied() method in ConquestMap.java class.
Major milestone: Unit collision is now functional.

CHANGES TO CONQUESTMAP.JAVA
Removed unnecessary imports.
Made ConquestMap class final.
Removed a debugging flag in initPointLocations() method.
Moved all units 1 grid closer to the centre.
Added unit collision checks to setGridOccupied() method. Only functional
for Unit 1 of Player 1 for now.

ADDITIONAL NOTES
The major mechanics of Conquest is almost finished. Because of this,
Conquest will be transitioning to Beta status within the next couple
builds.