Add syntax highlight support for solidity.
https://github.com/ethereum/solidity

For testing purpose
https://gist.github.com/hackjutsu/676539163fbe1093062ca14006d1b3ba

Candidate package
https://www.npmjs.com/package/highlightjs-solidity