Add transition when user types, results styling.

Add:
    static/js/index.js
        -Add conditional to prevent a search from being triggered when a
        non-character key combination (ie, `up`, `down`, `ctrl-c`) was entered.
        -Add `queryServer()`, currently only for testing purposes (it populates
        `div#results` with randomized content).
        -Add documentation comments to all functions.

    static/sass/index.sass
        -Add different styling to the `#search-field` whenever results are
        visible (in other words, at any point after a query has been executed).