[bug] Fix the usage

[SamuelToh]

Since this is a fork of another open source project. We should fix the usage text so visitors can correctly install our project.

So the installation command so include our @widesky scope.

[aniston]

Hi, i've been looking at many of the followers from the original project bacstack from Fabio Huser which is bringing a lot of confusion with the naming and versioning of each.

Can you please describe the added features or difference of this fork ?