Added KeepUpHeroku task for keeping up MT. #6
Use system function. #6
Use site url. #6
Added URI::Split. #6
Debug. #6
Do not use URI::Split. #6
Access to mt-keep-up-heroku.cgi. #6
Access mt-keep-up-heroku.cgi every 15 minites.
Merge pull request #10 from masiuchi/mt-develop

Access to app periodically for keeping up. #6