padlock icon in merged accounts mode: show when all connected accounts are connected securely, don't show it when one is not secured, do no care about offline accounts.

Remove saveposition. Now we always save and restore positions and sizes. See #3638. steve-e, this bug
is still opened for what you told ;)

 * yes YesNo dialog when a contact removes us to as if user wants to remove it too
 * fix some coding standards

See #3694


 * WARNING! Incompartible change! Now newtag=n.T.newtag do not creates new tag
but only returns existing one (if possible). If you need to create tag use
either .NT. method or attribute set (i.e. n.T.newtag=something).

 * Added CDATA extracting method to xml node.

 * added xmlns safety check

 * Fixed node attribute deletion with "del node[attr]" syntax.

 * Ordering fix for when addChild and addData are used on the same node (may increase memory usage, might need to watch for that)

 * Fixes for children node fetching, still not perfect, but much better

Make code a bit more pythonic.