don't think connection to server failed when only first connection attempt failed when creating a new account

when we right click on a word in conversation textview, even if it's not selected, show actions menuitem to look in dictionary and so on. see #2874

when we are disconnected from server, we then try to reconnect only with the type (tls, ssl, plain) that worked first time. Fixes #3896

 * Don't traceback when another resource of us is moving contacts to new/different groups.
 * Always refilter all involved groups.
 * It is now possible to not update contacts severside when using add/remove_from_groups

* Added NS_RECEIPTS to protocol namespace list.
* Show our support of XEP-0184 in caps.
* Added a big, fat warning to get_contact as this does not work as
  expected.
* There was some strangeness in our XEP-0022, it added an id tag to
  the x tag, which isn't mentioned anywhere in the XEP. And for some
  strange reason, that id even was the same all the time.
* Fixed a typo.

use SSLv23 method (it support SSLv2, v3 and TLSv1) instead of only TLSv1 method as some server (gmail) don't support TLSv1 method. fixes #3786

 * Change metacontact ordering. Fallback to priority only if two contacts have the same show, not the other way round.
 * Move contacts that just signed out to the bottom of the group, not to the top.

-Use a method to get_shown_groups (possibly more work to do (special group attribute))
-Show contact only if contact.ask, not according to modified xep 0162 logic. (I don't get neither the xep
meaning, neither this modified logic, can you explain steve-e ?)
-Remove contact before we modify it req_sub(). Else we can't remove it because iter is not found.
-When removing a contact and we let him in see us (observer), manually set show to offline, so he is not set as
visible.
-Remove observer from observer group if we asked him auth (I mean before he answer). Xep 0162 say he is not an
observer then. Fix contact staying in observer group when we get auth later.
-Renaming groups seems fixed (it's an accident :p )

More work on group to follow