Add scroll animation on expanded-reviews close

Tweak animation duration and scroll position
Extract load/expand/collapseReviews functions and refactor

Extract loadReviews and refactor

Rename that to self

Promote load/expand/collapse functions to methods on View object

Extract variables for readability and line length
Change animation duration to 300
Minor refactoring and cleanup

Prefix private methods with underscore

Flatten nested if statements
Add myself to contributors list
Merge pull request #162 from ryandv/scroll_up_on_hide_reviews

Scroll up on hide reviews