Add missing AP classes -- Coming soon page

From Twitter:

> @NedrickHaye: @StudyNotesApp Open Up the opportunity for people to submit notes for classes that are not listed. Like AP Chem and the others you list.
- [ ] AP Art History
- [ ] AP Biology (AP Bio)
- [ ] AP Calculus (AB & BC)
- [ ] AP Chemistry (AP Chem)
- [ ] AP Chinese Language and Culture
- [ ] AP Comparative Government & Politics
- [ ] AP Computer Science A
- [ ] AP Environmental Science
- [ ] AP French Language and Culture
- [ ] AP German Language and Culture
- [ ] AP Human Geography
- [ ] AP Italian Language and Culture
- [ ] AP Japanese Language and Culture
- [ ] AP Latin
- [ ] AP Macroeconomics (AP Econ)
- [ ] AP Music Theory
- [ ] AP Physics (B & C)
- [ ] AP Spanish Language
- [ ] AP Spanish Literature and Culture
- [ ] AP Statistics (AP Stats)
- [ ] AP Studio Art