add hide this menuitem for systray menu in windows. GTK/win32 SUCKS. do not ever use it for your own project unless it is something trivial

#2200.

merge ad_hoc branch. so we now have ad hoc commands and pubsub (atom). A great thanks to Tomasz Melcer (liorithiel) and Google Summer Of Code. fixes #189

it doesn't load new dataforms ui.

- Close connection after creating account. Fixes #2676
- Handle normal connection close by server. Fixes #2671
- Do not disconnect if we haven't received starttag yet. Fixes #2668. Fixes unticketed bug causing account creation not to work with PyOpenSSL and asynchronous handshake (see also #2671). Behaviour of #2634 is also improved but now results in deadlock.

(please say if don't agree)