* 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.

Fix some strange encoding error.

Backport some fixes to zeroconf: don't fail on special characters, don't allow gpg usage when it is not secure or even possible
Be more verbose when there is a key missmatch.

Mind that presence in zeroconf are not signed, gpg keys have to be assigned manually therefore.

Do not try to send encrypted messages when we don't use GPG, though it is enabled per user.

Only encrypt when the receiver is trusted. You have to sign its key or it has to be signed by someone you trust. Fixes #109

Make checkbox insensitive when GPG is disabled on an account (or no passphrase given).

Auto assign trusted keys on received presence. Deny encryption on missmatch of assigned key and signing key. Fixes #3376

Do not disable encrypted when receiving an unencrypted message. Print whether a received message was encrypted or not.

TODO: Remove togglebutton, its useless now

ability to block / unblock a transport. Remove log on / log off (it's the same as send_custom_status)