Beta 0.9 (preparation for release candidate status)

Conquest is now almost ready for release, with only minor bug fixing and
new graphics left to be done.

CHANGES TO CONQUEST.JAVA
Cleaned up code.
Added additional and informative comments.
Eliminated unnecessary hard-coded statements.
Minor bug fixes in upgrade unit buttons.
Reorganised code for better readability.
Added temporary "player1 wins" button to test and debug
ConquestScoresheet class (see below)

ADDED NEW CLASS CONQUESTSCORESHEET.JAVA
Description: Provide a summary of the game after the game has finished,
detailing who won and by how much.