init
Created setting page
Modified css loading method
Send request (for development)
update on popup
added access to review board page
changed color
fetch diffs since last time
add fade-out animation
working #3
completed #3
Made ReviewRequest object to manage states of review requests.
Merged in dev_#3 (pull request #1)

Completed #3
Removed interdependency
Display number of unread review requests on icon.
Sync badge counts with popup contents.
dev_#1 を master にマージしました。
from-to を区別しないように変更
Updated option page.
- Changed button style
- Added animation when button clicked
Adjusted style
Added a work around for time lag.