Grab Traffic/Clone Statistics from GitHub

This commit adds two new actions to the `github` pack: `get_traffic_stats` and `get_clone_stats`. 

This is a bit non-ideal for now in the manner the data is retrieved, but it is not available via the API as of today. It is only available behind an authenticated account via the web. 

I feel like there are probably cleaner Python ways to do this, but this works... so any input is appreciated on that front.