Removing old (unused) Bootstrap files from opentree app
Initial commit of Twitter Bootstrap and customization files.

Bootstrap v 2.3.2. See README.txt for details and next steps.
Added missing initial JS and CSS files from Bootstrap zipfile.
Added main less file for responsive bootstrap-responsive.css
Adding boilerplate content for custom-*.less files

Adapted from the 'swatchmaker' project at
https://github.com/thomaspark/bootswatch/tree/gh-pages/swatchmaker/swatch
Minor (formatting) changes to static CSS (from a dry-run using lessc)

    $ cd opentree/less
    $ lessc custom-bootstrap.less > ../webapp/static/css/bootstrap.css
Minor style fixes for splitter in HTML5 page.