many changes on index, styles, tabUI and more

- fluid grid applied on index
- myProjects(in index) has modified
- modified .num-badge. no background, no border.
- added .num-noti instead of former usage of .num-badge
- which active tab is remembered. (experimental: myProjects, pullRequest, projectHome)
- project labels are turn to gray
- unused code blocks removed
- modified codeBrowser code according to JavaScript module guide
- project menu style has modified