This package requires the "solc" (solidity compiler) program, which can be installed
following OS specific instructions from the ethereum website.
Add to your .emacs file configuration:
(require 'flymake-solidity)
(add-hook 'find-file-hook 'flymake-solidity-maybe-load)
If the "solc" path is different from "/usr/local/bin/solc", then add the line below (after changing your path):
(setq flymake-solidity-executable "/usr/local/bin/solc")
Uses flymake-easy, from https://github.com/purcell/flymake-easy
Author: Steve Purcell
Homepage: https://github.com/purcell/flymake-solidity