Upgrade to filebrowser 3.4.1

[marconius]

I forked fb and modified the templates and scripts (using some of the files from this project) to get fb to work without grappelli. There are still issues with the styles in some places and I only worked on the tinyMCE pop-up, so I'm not sure what is going on with the others.

Upgrading to newest version also takes care of issue #8, as filebrowser uses file-uploader to upload files instead of uploadify.

[wardi]

Nice. They've moved their repo over to git.

Now I just need someone to graft our tree back on to theirs, then we can share code more easily.