Suggestion: add installation instructions on readme

[Jaxelr]

Although i'm aware that the installations instructions can be found elsewhere, the readme included as a preview makes no mention of the installation process. I think it would be helpful for newbies to have them.

[sjc01234]

I am also totally in the dark of where the "contribution's list" is to view what shortcuts are made available by this extension for ADS.

[coffeebeantraining]

Agreed, at first i tried installing like everyone else and got redirected to the github repo.
then i discovered this is the way to install: