Update Grades Docs

[ramanxg]

At ZotHacks, a project used our API for the grades data. However, even though it might have been easier to use the calculated version, they used the raw version and calculated it themselves. It's a little unclear what the /grades/calculated endpoint does, and we could help it by adding more details about it, or even moving it to the top before the /grades/raw.

TODO:

• move /grades/calculated above /grades/raw
• Add to Exclude P/NP to be Exclude classes taken only P/NP.
• Specify /grades/calculated creates sum aggregates for the numbers.
• Repeat the list of parameters rather than saying it is elsewhere.

[snopachinda-gpi]

Hello! Would this be open to those outside of UCI? The API looks fun and I would be willing to help out with documentation.

[ramanxg]

If you could help out that would be awesome. Issues labeled help wanted are open to any developer.

[snopachinda-gpi]

Sure! Feel free to assign me. I will make a pull request over the weekend.

[ramanxg]

So sorry!!! Unfortunately, we want to have issues for some of our upcoming student developers at UCI, who are new to web dev and open source.

[snopachinda-gpi]

No problem! Let me know if you'd like my help on other issues like SQL and such. I develop APIs for big data so I'd be happy to take a look :)