only half of the diff is correct (the window opening).

lots of lines looks like nk's experimentations and obviously do not cleanup
anything nor make the thing works:

* print 'show', name
* self.filterstr = 'account'
* print 'refilter starts'
* print self.filterstr
* self.modelfilter.refilter() #FIXME: does not work!

advanced config allow opening only once, cleanup in filter [still does not work], cleanup in glade for advanced config window

when we right click on a contact that is not in the roster, there is 'add to roster' in the menu (fix ticket #55)

it can be configured through the advanced config window
fix ticket #184

to check_for_new_version

last time I see that before I block this kind of commit directly by svn.

the position of the button is probably not the final position.
modify config to support boolean value embedded in string because the treestore
store/edit all value with a string.