Log Message:
Update to 2.8.3.

Changes:
 2.8.3
     This release properly fixes a bug regarding rounding of error rates, which was
     not fixed properly in the previous version. 
 2.8.2
	 A rounding error was fixed that was causing the user to "fail" a drill
	 despite having apparently met the error rate requirement. A
	 user-submitted Basque translation was added.