Merge pull request #1 from AlphardWang/master

Add My Submission link and redirect
Fix language collection mistake in new submission
Merge branch 'master' of github.com:leewings/ACM-Ladder

Conflicts:
	app/views/submissions/new.html.erb
Place bootstrap after jquery in application.js
Update todo
Update readme: add tmp create
Change status and my submissions to dropdown menu
Set problem's level to -1 to hide it
Update submission result line
No centering Problem column in submission result