redesign heatmap
change time locale for db
impl the heatmap
change color
rake assets
Merge pull request #55 from katsuhide/improve_heatmap

Improve heatmap
change the order of the badge
bug fix for activity table's base_date
change function for setStartTime
change style of the popover
delete the heatmap button
change the judge logic
rake assets
Merge pull request #57 from katsuhide/issue_58

Issue 58