Icon Request: fa-blockstack

Hello,

No results in search, new icon represents a decentralized computing network and app ecosystem.

https://blockstack.org/

![image](https://user-images.githubusercontent.com/9038904/74485810-d97b4d00-4e78-11ea-8631-0d76215812c3.png)

Proposed SVG Icon:
```
<svg width="445" height="445" xmlns="http://www.w3.org/2000/svg"><path d="M346.339 0c30.448.005 46.036.165 58.34 5.489a66.738 66.738 0 0134.743 34.743c5.324 12.304 5.483 27.891 5.488 58.34v247.767c-.005 30.448-.164 46.036-5.488 58.34a66.74 66.74 0 01-34.744 34.743c-12.303 5.324-27.891 5.483-58.34 5.488H98.572c-30.448-.005-46.035-.164-58.339-5.488A66.738 66.738 0 015.49 404.678C.165 392.375.005 376.787 0 346.338V98.572C.005 68.123.165 52.536 5.49 40.232A66.737 66.737 0 0140.232 5.49C51.781.165 68.078.005 98.57 0zm-52.855 253.398c-22.208 0-40.21 18.003-40.21 40.206 0 22.202 18.002 40.206 40.21 40.206 22.196 0 40.199-18.004 40.199-40.206 0-22.203-18.003-40.206-40.199-40.206zm-142.07.04c-22.191 0-40.186 17.994-40.186 40.191 0 22.186 17.995 40.18 40.187 40.18 22.192 0 40.187-17.994 40.187-40.18 0-22.197-17.995-40.191-40.187-40.191zM293.48 111.26c-22.203 0-40.206 18.003-40.206 40.2 0 22.206 18.003 40.209 40.206 40.209 22.202 0 40.206-18.003 40.206-40.21 0-22.196-18.004-40.199-40.206-40.199zm-142.069.008c-22.186 0-40.18 17.995-40.18 40.187 0 22.193 17.994 40.188 40.18 40.188 22.198 0 40.192-17.995 40.192-40.188 0-22.192-17.994-40.187-40.192-40.187z" fill="#000" fill-rule="evenodd"/></svg>
```

