Updated test, section, fixed some null comparisons
Unit page updated
Updated navbar for courses
Update editcourse.html

update in Git Hub direct
Update course.js

added directly
added course information
Practice page polish
Merge branch 'master' of https://github.com/lexloren/E99-Language-Learning.git
Merge remote-tracking branch 'origin/master' into back-end-working
Improved error checking and reporting.