Added initial support for grading checklists

Conflicts:
	Gemfile
	Gemfile.lock
	db/schema.rb
Fixed accidentally relying on nonexistant ids
Fixed some ordering stuff
Integrate grading tool to feedbacks page

Conflicts:
	app/models/course.rb
	app/views/users/show.html.erb
	db/schema.rb
Fixing stuff?
Linked checklists and registrations together!
Better js api to checklists
Fixed ordering bug
Autosubmit the checklist form
Do not oversubmit the grading form
Autosubmiting actually works on user pages
More lightweight display of ids
Proper code editor with vim mode
Inline script moved to assets
Fixed editor trying to do stuff even if no element on page
Added remarks to checklists
Added forgotten form edits
?!?
Stupid typo fixed
Added more js functionality