Apply this new one to issue, board and search.

For more details, See docs/technical/pagination.md

Conflicts:
	app/controllers/Application.java
	app/controllers/ProjectApp.java
	app/models/Project.java

Now, members can see their project list by sorted
- by creation date
- by name
Main Layout has border
and...
sorry, I can't remember any other things any more... HAHA

Site administrator could not delete a project if he or she is not
manager of the project. Fix the bug by using AccessControl while check
the permission instead of ProjectUser.isManager.

Markdown's Edit/View tab has bothered that switch between title and body
with tab key.

 to avoid some popover bug and popover message overlapping

Milestone has stored many calcaulted values (e.g. number of open issues)
persistently in database and it causes many problems. They should be
calcultaed just in time.

Also remove many lines of codes because this fix eliminates the needs.

No one have been able to be removed from members.