2015-07-08-2318-aa1a937

Line thickness boost is now less extreme, diminishes with puzzle size (fixes large games), and can be disabled entirely by an option.
Fix crash on Game ID dialog.
Fix "done-ness" of clues not being rendered on first draw.
Reinstate ability to deselect square by tapping outside the board on Towers/Undead.
Tweaked night mode colours.
Tidied up Settings a bit.
Option to show edges of keys.