fix unseen notification count for mission and training
fix mission action for students
fix route to mission or training in assessment index page
routing: questions directly under assessment resource
move mcq views under assessment folder
group assessment views under assessment/assessments folder
update course ability for questions
combining mission and training show page (1)
create parent class question controller to handle build resource of different type of questions
remove index action in training and mission controller
move files to assessment folder
refactoring, renaming mcq answer to option
refactoring can_start  method in assessment model
fix course ability, inherit from ability
add gem jquery-tmpl-rails
coding question controller and UI works for training
mcq and coding question preview working in assessment show
better way to reorder assessment questions
move position column to assessment question relationship table

if a question is present in different assessments, it should be able to be at different position
refactoring assessment show page, less conditional check