Set version to 2.1.5
tagged version 2.2.0
tagged version 2.1.5
Changelog for 2.1.5 release.
Merged r11041 from trunk.
Changelog for 2.2.0 release.
Merged r11036 from trunk to 2.2-stable (#12615, #12619)
Russian translation changed by Kirill Bezrukov.
Merged r11035 from trunk to 1.4-stable (#12615)
Russian translation updated by Kirill Bezrukov.
Merged r11035 from trunk to 2.1-stable (#12615)
Merged r11035 from trunk to 2.2-stable (#12615)