Add tutorial to give new users an introduction

[Bad-Science]

Many websites have tutorials for first-time visitors demonstrating how to use the site.

It is know that there are many features of YACS that are not the most intuitive, and many users don't aren't aware of all the features.

We should create such a tutorial that is run once when a user first visits the site, and again if we ever introduce big changes.

We will start a thread here with potential items to be included in the tutorial.

[marchdan]

Should include general website navigation such as:

• Searching for a course/professor
• Navigating between Schedule view, course view, and topics view
• Moving between different schedule options
• Interacting with a course sections(In all view windows)
    Selecting every section vs one specific section
• Logging in/out(once implemented)
• How to reopen the tutorial if needed

[fakedestinyck]

I'm currently trying to use ngx-tour-ng-bootstrap to implement this feature.