Multiple access keys

[limikael]

We should create the possibility to create multiple access keys on a remote that have the options to do different things on the remote system. E.g. we might want to create one key that can only download content, and another one that can upload. Another example would be where we can create a key that can upload new content, but not overwrite changes on the server. The interface for this could look a bit similar to GitHub's personal access tokens, see attachment. As part of implementing the solution for this issue, we need to create a list of which privilege levels the different keys can have.

[limikael]

Solved it in a slightly different way. There is now one upload key and one download key.