Updated `Utils` from nsnake
Now `yetris` saves high scores (closes #18)!

There are some rough edges but now the high scores are a-go!
They're tied to "Profile", so each user has its own high
score file.
Removed unnecessary fields on `Profile.Settings.Game`
Fixed awful bug - now each configuration has its own score!
Fixed two critical bugs in a simple way.

* Prevented the high score file to keep stacking previous
  scores, even if they weren't high scores.
* Fixed "Segmentation Faults" that occurred when `highScore`
  was NULL.
Fixed defaults for "Ghost Piece" and "Hold Piece"