Add support of Solidity linter

[idrabenia]

Hi Guys,

We develop code linter - Solhint, that provide:

1. Strict source code validation according Solidity Style Guide
2. Security code check using ConsenSys Guide for Smart Contracts
3. Best practices code validation

We think that it would be awesome to add some kind of code validation to your project.

You may contact us - we will be glad to help!
- Ilya

[cag]

😂 I was too busy, but @fvictorio took care of this for us...

Oh yeah, gotta merge this in with development now...