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.

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.

Add:
    static/js/index.advanced-search-form.js
        -Prevent the user from removing the last input field in an
        advanced-search group.

Rem:
    templates/index.html
        -Remove vestige code accidentally preserved during the c6e5b4f merge.

search results from codelets.

Add:
    static/js/index.js
        -Fix #23.
        -Move callbacks to an function that gets executed on definition, for
        more aesthetically modular code.

Rem:
    static/js/lib/typeahead.bundle.min.js
        -Remove the `typeahead` plugin, which is not longer used for
        autocompletion.

Add:
    templates/index.html, static/js/index.advanced-search-form.js
        -Remove commented-out code, `testQueryStringGeneration()`, etc.; prepare
        for merging into `develop`.

    static/js/advanced-search-form.js
        -Perform a live update of the main query bar with a user's inputs in the
        advanced search form.

Add:
    static/js/index.advanced-search-form.js, static/sass/index.sass,
    static/css/lib/jqueryui.custom.min.css
        -Add `jQuery UI` autocompletion menu to the advanced-search form's
        language input field, to replace `twitter typeahead` (which was
        incompatible with the new form's style rules).

    static/js/index.advanced-search-form.js
        -Add regex field specifier to query string.

Add:
    static/js/index.advanced-search-form.js
        -Add `assembleQuery()`, which constructs a query string from the
        contents of the fields of the advanced search form's search groups.

Add:
    static/js/(index > index.advanced-search-form).js
        -Migrate code relevant to the advanced search form to its own file.
        -Group global-scope function calls into wrapper functions executed on
        definition.
        -Add datepicker to new form's input fields.

Add:
    static/js/index.js
        -Add ability to select an existing search group to edit.
        -Add ability to remove search groups with a button.

    static/sass/index.sass
        -Add styling for `div#header`, which contains the titles of both columns
        ("fields" and "search groups") in the advanced search form.

Add:
    static/js/index.js
        -Add callback functions to the buttons/checkboxes in `#sidebar`, which
        allow the user to add new search groups, and to add input fields to the
        currently selected search group.

Rem:
    static/js/index.js
        -Remove obsolete functions which allowed the creation/deletion of search
        groups in the old form.

search results from codelets.

Add:
    static/js/index.js
        -Add header comments to existing search-group manipulation functions.

    static/sass/index.sass
        -Remove style rules for the old advanced search form.

    templates/index.html
        -Add element tree for new search form.

Add:
    static/js/index.js
        -Add advanced-search form search-group logic.
        -Allow users to create new search groups, and cycle through existing
        ones.

    static/templates/index.html
        -Add search-group count widget, and selection/addition buttons.

    static/sass/index.sass
        -Style the various search group elements.

Add:
    static/js/index.js
        -Move `div#title` to the corner of the page when the search bar is
        `.partly-visible` (ie, results are displayed).

    templates/index.html, static/(sass/index.sass, img/*.png)
        -Replace the advanced-search button with a magnifying glass icon.

Add:
    static/js/index.js
        -Add a `jQuery` callback to `fadeIn()` and `fadeOut()` the
        advanced-search form.

    templates/index.html, static/sass/index.sass
        -Add advanced-search form toggling button markup and styling.

Add:
    static/(css, js)/lib
        -Add directories to contain third-party library files (eg,
        `jquery.min.js`).

    templates/index.html, static/js/index.js
        -Move `typeahead` initialization from `index.html` to `index.js`.

    static/sass/index.sass
        -Refactor `twitter-typeahead` specifier hierarchy.

Add:
    static/sass/index.sass
        -Add style rules for `datepicker` and `typeahead` elements.

    templates/index.html
        -Add any class specifiers required by both libraries to their
        corresponding elements.
        -Add a hack-ish `script` tag containing setup for `typeahead`.

Add:
    templates/index.html
        -Add compartmental `div` structure for the advanced-search form.

    static/sass/index.sass
        -Add layout style rules to the advanced-search form.

    app.py, templates/(about, developers).html
        -Add `Flask` routes and skeleton files for pages to be developed later.

Ref:
    static/js/index.js
        -Substitute some verbose `JavaScript` calls with their `jQuery`
        equivalents.

Add:
    static/js/index.js
        -Add new results to the results `div` whenever the user scrolls to the
        bottom of the page.

Add:
    static/js/index.js
        -Add `populateResults()`, to distinguish the addition of results to
        `div#results` from the retrieval of Codelets from the server itself.
        -Add `clearResults()` for convenience.

    static/sass/index.sass
        -Add `.cascade`, to provide new `div.result` elements with a
        downwards-cascading animation.