Add Mumble Icon

[mrdrogdrog]

This PR adds the icon of Mumble

Fixes #278

[shinenelson]

I will let you fix that merge conflict while I build the icon locally to see how it looks.

PS : You cannot fix your own pull request, I think you intended to link #278.

But good going anyway 👍

[mrdrogdrog]

Fixed it. I also resized the icon. You should pull again.

[shinenelson]

while this looks okay

I think we could avoid the circle around the logo unless there are strict brand guidelines around it.

[mrdrogdrog]

I'm not sure.. It's always used with that circle.

[shinenelson]

From a brand perspective, sure, but I am thinking about the various use-cases where this icon might be used. It can be used on project pages where they list their social media accounts. And when all other icons do not have an enclosure, it would be odd if this logo is used with the enclosure.

And besides, one can stack a fa-circle, fa-square or whatever other icon that is available in the set to re-create their desired output with fork-awesome.

[mrdrogdrog]

I removed the circle

[shinenelson]

this looks much better