`app.jsx`: starting to persist / retrieve (set/get) "choices" (a chooser choosing/not choosing a chosen) via Parse DB. Moved user data from hardcoded `stub` to Parse.

`remote.js`: Ditto (choices); Fetching user data from DB; New Parse key;

`locations.jsx`: Ditto (choices); Ditto (user data)

`index.html`: minor, updated page title

`swipe-stack-0.1.js`: Modified existing callback option to support our usage

`app.scss`: minor changes to `.round-buttons`