Add information for "total contributions"

[mschwager]

Hey all,

Often when checking a user's contribution history it's interesting to know the total contribution count. We can sum the years by hand, but it'd be awesome if this was automated.

I'm envisioning something as simple as adding a line after "@user on GitHub" like "XXXX total contributions".

[sallar]

That's a great idea.

[amm98d]

@sallar I could take this up

[sallar]

@amm98d yes please

[amm98d]

@sallar thanks, will submit a PR

[sallar]

Thanks @amm98d this is merged