Add comment form and use database for comments

[sarahkwon]

renders comment form on click

no comment backend setup, for now the submit button writes to the console.

[coveralls]

Pull Request Test Coverage Report for Build 1465891815

• 40 of 93 (43.01%) changed or added relevant lines in 10 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-4.2%) to 48.864%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
client/src/pages/LocationPage/ReviewSection/Review.tsx	5	8	62.5%
src/routes/users.ts	2	6	33.33%
client/src/pages/LocationPage/ReviewSection/index.tsx	6	16	37.5%
client/src/pages/WriteReviewPage/index.tsx	9	24	37.5%
src/routes/reviews.ts	8	29	27.59%

Files with Coverage Reduction	New Missed Lines	%
client/src/pages/LocationPage/LeftColumnDetails.tsx	1	90.91%

Totals
Change from base Build 1457708883:	-4.2%
Covered Lines:	284
Relevant Lines:	487

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💛 - Coveralls