Bump metadata version and add upgrade step.

- Upgrade step installs strophe.vcard.js and removes underscore.string
Remove dependency on collective.js.jqueryui
Flake*
Add Backbone.localStorage to js registry
Remove GS-XML dependency on collective.js.jqueryui
Bump submodule to latest commit in vcard branch
Update attrs

- username attr is not used anymore
- add prebind attr to indicate prebinding (as opposed to manual login)
Set dependency on Products.CMFPlone >= 4.3rc1 (due to JQuery 1.7)
Remove burry.js
Add fullname again. Fetching from vCard every time is not efficient.
Bump Plone to 4.3rc1
Bump submodule to head of convere.js's vcard branch.
Pin to plone.app.jquery instead of CMFPlone
Update HISTORY from master
Update history with info on next major release
Bump resources submodule to head of master branch
Remove separate element for showing connection info
Merge branch 'vcard'

Conflicts:
	docs/HISTORY.txt
	setup.py