Merge pull request #55 from cocosvsn/master

dashboard button  logo
Remove menu in user dashboard.
Add notifications ajax support. Adjust TODO layout.
Add ajax form support for examination.
Change tracing project to tabbedwidget.
Add dropdown menu for system notification.
add user id to new course
merage examinations ajax form
Do not raise excepteion for create examination.
dashboard add ajax new examinations function
merge fix ajax new examinations error

Merge branch 'master' of https://github.com/jasli2/evolution
modify quick button style, change login page logo to text, add header border bottom, add auto get user notification
Remove auto update notifications viewed_at which will be update by PUT /users/id/notifications.
merge remove auto update notification status
Merge branch 'master' of https://github.com/jasli2/evolution
Fix bug for text encoding.
fix error with pre merge
Merge branch 'master' of https://github.com/jasli2/evolution
Fix typo.
fix get notification error
Merge branch 'master' of https://github.com/jasli2/evolution
Fix issue which model cannot get url path.
fix ajax get notifiction error
Merge branch 'master' of https://github.com/jasli2/evolution