add ui for watch settings
Finish front side.
Add visible directive.
Remove unused tag.
Add account name in user page.
Add mail gem.
Add mail config.
Remove unnecessary config.
Add watching relationship model.
Add server side code.
Fix subject content.
Add sendmail background task.
Add named queue to avoid conflict.
Finish watching feature.
Fix rakefile.
Finish the first complete feature.
Fix a miss.
Add some colors.
Merge pull request #23 from 3sword/watch-reports

Watch reports