Emacs Solidity - v0.1.10

• #52: Support solc >= 0.6.0
• #49: Don't run cmode hooks for solidity mode
• #45 Don't keyworld color substrings of keywords
• #42 Imenu support
• #35 Support newer solium version
• #33 Fix unrecognized option --add-std error, that was a remnant from rather old solc versions