brogue 1.7.3

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>
brogue: move highscores file

This used to live in the prefix, which meant it was versioned and
wouldn't persist across versions. Now it's placed in var/brogue.

Closes #74.

Signed-off-by: Misty De Meo <mistydemeo@gmail.com>