Added a note
Added some documentation.
Added comments to the opcodes in the switch statement.
Changed game-open directory to the System.getProperty("user.home") to be
more generic.
Updated documentation.
Added more documentation, as well as a stop() method to ease the process
of stopping a game.
Added a new exception class.
Added documentation for Key class.
Added documentation.
Refined the exception catching clauses.
Added some documentation.
Merge branch 'master' of https://github.com/ArreatsChozen/Chip8.git