Took the Command interface out of TextUI.java.
Added a snap sound effect taken directly from sdin.jp/en/en/browser.board/shogi/, courtesy of Windows Sound Recorder.
Renamed SoundEffects.java to SoundEffect.java.
Fixed bug with Kings not rendering properly when selected.
Worked on BoardPanel.java
Messed around with Command.java and TextUI.java a little. Grouped String regex, String detail and void execute(String command) all together in one class.
Added board labels.
Updated TODO.txt.