Add discuss controller.
change style for attachment list.
add some permission to view course class information.
adjust training plan views.
1. Adjust comment controller to let comment act as polymorphic.
2. Adjust training plan views.
Adjust admin dashboard view.
In user's dashboard. Showing TODO list and trace project as the most inportant information.
Also add action direct in TODO and trace project to let use handle more easily.
Remove debug information.
Adjust view to display cousre and class. Add examination link.
Add course class publish address and time feature and sent out notification to students.
meger jasli2 branch