add toolip for assignee infomation  on issue list
Merge pull request #421 from insanehong/issue/assigned-tooltip

Fix #414  -  add toolip for assignee infomation  on issue list
change link color(RGB4183c4) on README area
Merge pull request #422 from insanehong/issue/link-color

change link color(RGB4183c4) on README area
fix n#71, n#65, n#60, n#56, n#52 and more

- n#71. enroll button style
- n#65. enlarge font-size in board/issue
- n#60. repositioned label tag in issue list item
- n#56. duplicated yobi.Label init
- n#52. change text on active
- switch issue state color between closed with open
notification: Log call trace for an exception.
move search panel to left on issue list
user: sort member list by name asc
notification: Fix errata. s/떄/때/
notififcation: Add Notification for Code Comment.
Merge pull request #423 from laziel/fix-ui-130801

UI changes(130801)
Merge pull request #425 from npcode/feature/noti-for-code-comment

notififcation: Add Notification for Code Comment.
user: Delete the old avatar after uploading new one.
fixed n2br markdown syntax randering for issue editor
code: add 'toggle comments button' @ commit view
code: Allow nonmember to comment on code.
avatar: change default avatar image
member request: fixed a bug

* deleting the member request which was submited befor adding it as a new member
notification: Delete it while deleting its source.
Merge pull request #427 from insanehong/issue/markdown-n2br

fixed n2br markdown syntax randering for issue editor