change api of since_hours_ago to hours_ago of class Fixnum
refined github api, and date util
refactor Status of Hackathon's summary
do not return string, return obj
finished the refactor process for table.json/html
Update TODO to keep track of what we're doing
add namespace
implement scoreboard for leaderbard
implement table html for leaderboard
remove useless puts
Merge branch 'master' of github.com:secreek/hackatus
Merge branch 'dev-split'

Refactor hackatus

- Better modularization
- Implement hackatus for leaderboard