Add image upload option in review page

[chriscerie]

closes #181

[coveralls]

Pull Request Test Coverage Report for Build 1537650240

• 22 of 109 (20.18%) changed or added relevant lines in 6 files are covered.
• 7 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-2.5%) to 38.43%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
client/src/components/Header/ProfileIcon.tsx	3	4	75.0%
client/src/pages/WriteReviewPage/PhotoPopup.tsx	5	14	35.71%
client/src/api/GetBase64.ts	3	15	20.0%
src/routes/reviews.ts	1	29	3.45%
client/src/pages/WriteReviewPage/index.tsx	8	45	17.78%

Files with Coverage Reduction	New Missed Lines	%
client/src/pages/LocationPage/ReviewSection/Review.tsx	1	36.0%
client/src/pages/WriteReviewPage/index.tsx	6	17.72%

Totals
Change from base Build 1537185017:	-2.5%
Covered Lines:	345
Relevant Lines:	689

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💛 - Coveralls