New commits in `feature/style` address various issues.

Add:
    templates/index.html, static/(sass/index.sass, js/index.js)
        -Add hotkey help div, which fades in whenever the `?` hotkey is pressed.

Add:
    static/js/index.js
        -Suppress hotkey (`h`, `j` `k`, and `l`) events when the keys are
        entered in text input-fields.

Add:
    templates/index.html, static/(js/index.js, sass/index.sass)
        -Add error messages for failed queries.

to go now.

disabling mouse events on scroll and enabling them after scroll is finished.

Add:
    static/js/index.js
        -Complete `queryServer()`.

    static/sass/(index, _mixins).sass
        -Add `opaque()` mixin.

Add:
    static/js/index.js
        -Add `resultsHotkeys()`, which gets executed on definition and maps all
        keyboard shortcuts.
        -Add handler-functions for `h`, `j`, `k`, `l`; complete functions for
        `j` and `k`, to scroll between results.

Add:
    static/js/index.js
        -Add untested server-querying to `queryServer()`, which previously just
        generated random results.

Add:
    static/sass/index.sass
        -Add style rules to fix bugs, and improve the appearance of some minor
        details.

    static/js/index.advanced-search-form.js
        -Close #41. Add statements to scroll to the bottom of the search-groups
        div when any search-groups/input fields are added.

Fix:
    bitshift/languages.py
        -Python's `u"string"` unicode specifier results in a Javascript syntax
        error when pasted verbatim into `templates/index.html` by Flask; add
        `str()` to the languages array loader to fix it.