edited and changed course management
 change to a constraint (copying course 5 years)
Merge pull request #53 from itpun/patch-8

 change to a constraint (copying course 5 years)
Merge pull request #52 from itpun/patch-7

edited and changed course management
Bit of space on the top of the doc
Revising Grading Activities

The Grading Activities sections under Instructor and TA/TM are revised
as per comments.
Merge pull request #54 from graemesmth/master

Revising Grading Activities
Revised UI for Activity Management

Activity Creation/Modification UI section revised so inputs and outputs
are in a table. Also changed its description
Added changes to Markus' section (instructor)

Updated the instructor section per comments and grading of
the third deliverable.
Merge pull request #56 from mabalaski/master

Added changes to Markus' section (instructor)
Merge pull request #55 from graemesmth/master

Revised UI for Activity Management