Added a test tool for the OSS plug-in
Support WAVE files with 16 bits per sample
Keep track of every notification ongoing
Fixed the icons for the dial pad and window
Also play a "ringback" sample while outgoing calls ring
Updated the copyright line
Updated the French translation
Added {keytone,ringback,ringtone}.wav sound samples

Imported and converted from the "freedesktop" sound theme
Fixed building with Gtk+ 3