Removed unnecessary check if sandbox course exists

Since using timestamp as part of course_id, sandbox being created should be unique.
Made search query optional when getting course list for a given term

Now, if no search query is given, it will return the entire course list for that given term
Merge pull request #55 from ronvs/fix-sandbox-course-function

Removed unnecessary check if sandbox course exists
Merge pull request #56 from ronvs/course-list-api-update

Made search query optional when getting course list for a given term
Merge branch 'refs/heads/sfu-develop' into sfu-deploy