Require GTK/PyGTK 2.8 instead of 2.6 (means ability to use new cool Glade3 features and new pygtk api)
Why:
- foo.set_text('bar') becomes foo.props.text = 'bar' and that's C0000L
- glade3 which is c00000000l reqs 2.8+
- because GTK/Pygtk 2.8 is one year old GTK (PyGTK), that means we can remove some old code about GTK 2.6
I'm more than happy to assist in glade-ing our code, and in rm'ing the legacy code, but I won't do it if you guys think it's too soon (eventhough it is not, because I think .11 will be out in Xmas?)