Add a PrintDialog widget
Update POTFILES.in
Conditionally use header bar in print multiple dialog
print-dialog: tweaks
Tweak DifficultyCategory.to_string() some more
print-dialog: workaround double emission of response signal

https://bugzilla.gnome.org/show_bug.cgi?id=737895
Fix clock causing excessive CPU usage

Separate from the "Sudoku generator causes excessive CPU usage" issue.
Name the clock timeout

https://bugzilla.gnome.org/show_bug.cgi?id=737506
Tweaks to the clock code

This doesn't change anything, it should just be a bit clearer.
Updated Hebrew translation
SudokuGame: type cleanups

None of this code is specific to ArrayLists, and classes are already
reference types.
Revert unrelated change in previous commit

Whoops
Workaround 100% CPU usage issue

No clue what's going wrong here....

https://bugzilla.gnome.org/show_bug.cgi?id=737507
SudokuBoard: more type cleanup