Dbus identities

[bublath]

Sorry to reopen an new PR - git still is a mystery to me sometimes and rebasing/merging code isn't working out as expected.
This PR should adress all your concerns and hints.

I'm sure there is still room for improvement.
Once we finalized this, I'll update the documentation as well of course.

[AsamK]

The interface look good 👍

[bublath]

Added the documentation. While doing that I realized that case sensitivity was different from Devices and Groups, so I updated that as well.

One additional idea: it would be nice to give a similar capability as the App to display your own safety number along with a QR code, so you could establish trust both ways. Any hint how to get that and how to make a QR out of it?
(for device links I have been using https://chart.googleapis.com/chart?cht=qr&chs=200x200&chl=.)

Once we're done I probably should create one clean commit for this to clean up the mess I created when messing with git

[AsamK]

One additional idea: it would be nice to give a similar capability as the App to display your own safety number along with a QR code, so you could establish trust both ways. Any hint how to get that and how to make a QR out of it? (for device links I have been using https://chart.googleapis.com/chart?cht=qr&chs=200x200&chl=.)

There's no such thing as your own safety numbers anymore. The safety number of a contact is created from the contact's private key and your own private key. So the same safety numbers will be displayed on both sides.
The QR code is created from the scannableSafetyNumber, I think you need to convert the base64 number to byte array and then to a string using latin1(?) Encoding and create the qr code from that.

Once we're done I probably should create one clean commit for this to clean up the mess I created when messing with git

I'll just squash the pr when merging, that's just a button click in GitHub.

[bublath]

Sounds good. I need to try that QR stuff at some point, but that's independant of this PR.
I did some tests with this code and all looks like expected.
Let me know if there are more changes requires - otherwise I would consider this done.

[AsamK]

Looks good, thanks!