fix README.md: pass websocket to handle_websocket
Merge pull request #143 from subledger/fix_readme

fix README.md: pass websocket to handle_websocket
Updated http gem version since reel is incompatible with 0.5.x series.
Merge pull request #144 from unakatsuo/fix-gemsepec

Updated http gem version since reel is incompatible with 0.5.x series.