Run `konacha:run` with thin

https://github.com/jfirebaugh/konacha/issues/146#issuecomment-20961456
Fix broken spec
Workaround for webmock

https://github.com/bblimke/webmock/issues/317
Merge pull request #162 from fastladder/fix_konacha_run_error

Run `konacha:run` with thin