Added the possibility to upload a Public GPG key. - #460

Hello there! :)
Sorry for the late feedback! Could you add some verification in this? Since we're suppose to accept a valid base64, It could be great to ensure that the text is always encoded.

Also, the key indicator should probably have a data:application/pgp-keys;base64 attached for better handling by other apps :)
https://tools.ietf.org/html/rfc6350#section-6.8.1

@skjnldsv thanks for the feedback.

Which files would be the right place to add the base64 check?
Should it just be added in templates/detailItems/key.html?

And for the key indication data:application/pgp-keys;base64 while implementing, but somehow failed to encode it in the given strukture.
So I lookt for alternatives and found this one in https://en.wikipedia.org/wiki/VCard

I but I see your point and will have a look into this, if it is clear what is going to happen to the dependency PR on the server side.

@tacruc sorry for the very late delay.
Because we planned to upgrade this app to vue we couldn't merge your pr.

We'll try to add this feature into 3.1.0 :)