Implement UI for certificate info

[ecausarano]

Make card view to see details of certificate. Can be used to view own identity (with additional info or graphics for private key.)

The WOT part of the view should provide a filter to query cards (including public key data) that have been cached locally and to run a network query.

The card details should contain a little graph fx with your trust relation to the card:
You - the card
You - B ban institution - the card
_ someone you trust _/
And so on...

If the user has a private key, the card view should contain a locked button to endorse the selected card (let's start simple: for now only one "direct trust" endorsement type, later on we can add indirect trust bundles that contain your signature of the card bundle of together with the ids of other intermediate cards you selected as evidence.

[ecausarano]

This means that trust setting in the keychain and public endorsement are two different things...

This allows passive users to build their own WOT without necessarily making it public