Add feature to browse repositories on a remote Git server

[danielwagn3r]

Most popular Git servers and services provide the possibility to browse and search available Git repositories, e.g. BitBucket and GitHub allow this.

Would be great to have this available as well, also with credentials stored per service and not per repository.

Here's an example from SourceTree:

[Phillipus]

We are working on SSH support so this may be possible in the future.