GTK versions on various distributions

Distribution	GTK version	libssh version	libvnc version
Debian 7 Wheezy (current Raspbian)	3.4
Debian 8 Jessie	?
-
CentOS 7/RHEL 7	3.8
-
Ubuntu 12.04 LTS (Precise Pangolin)
Ubuntu 14.04 LTS (Trusty Tahr)
Ubuntu 14.10 (Utopic Unicorn)	3.12
Ubuntu 15.04 (Vivid Vervet)