Louder ticking sounds

(cherry picked from commit eb240afa222664dd58ee0bd8b965aea1e6adcb59)
Bump gnome-shell compatibility to 3.12
Update dbus interfaces to use new syntax
Volume control of notification sounds

(cherry picked from commit aeb0ec980da771d4d321312b1f85a97e8dc6e23e)
Makefile cleanups
Add dbus-glib-devel to list of reqirements
Fix for changes in Notification.addButton in gnome-shell 3.12
Fix reminder showing up during pomodoro

(cherry picked from commit fc7c2c376d80c278cfbecd629d8c86762d2d8a8e)
Prefer tarballs instead of zip files
Fix focusing properties window
Add wake_up_screen to screensaver interface
Simplify brining preferences dialog to focus
Merge branch 'gnome-3.12'

Conflicts:
	extension/notifications.js
	lib/preferences-dialog.vala