New format + README organization

[qasim]

This is the PR that will reflect new format proposals from #39, along with a newer proposal for scraper organization for ones that require a different scraper for each campus.

Let's take Exams for an example. If a user calls Exams.scrape(), it should subsequently perform the following:

• UTSGExams.scrape()
• UTMExams.scrape()
• UTSCExams.scrape()

Of course, you can directly call the above APIs still. This just adds a convenient alias to scrape all of them with one call. All of these scrapers remain in the global namespace, so no changes with that.

Note: Only the README has changed so far; I will be reflecting changes to the actual codebase as well once all of the scrapers currently in development / almost complete are merged.

[qasim]

On another note: the second proposal will also allow for more abstraction within scrapers. The Exams scraper can now hold methods that are common to the sub-scrapers.

[qasim]

Some other notable changes:

• CourseFinder has been renamed to Courses to better reflect how we've been naming things for other scrapers.
• UTMShuttle has been renamed to Shuttle since it is currently the only shuttle service that UofT provides other than referencing the TTC. If UTSC decides to start a shuttle service, we can split this.

[qasim]

Good to go from my end.