Remove "/" from static URLs to allow for non-root URLs

[diranged]

I want to run Flower behind our Nginx proxy (which provides authentication, SSL, and a few other nice features for us) on our tools machine. I cannot currently redirect "/flower" to the flower app though, because the flower app makes all of the URLs relative to the root URL. Ie, static links to "/static/foo.js" rather than "static/foo.js".

[mher]

To deploy flower to non-root URL you need to launch flower with --url_prefix option and use nginx rewrite. Issue #13 contains a sample nginx config.

[diranged]

Sorry I see thats fixed in the master-branch, just not in the latest release. It works too. Thanks :)