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.

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:
    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.

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).

Add:
    static/js/
        -Add directory for all `javascript` files.

    static/js/index.js
        -Add functional search-bar typing-begin and typing-end detection.
        -Currently logs an appropriate message to the console in either state.