Programmatically upload bokeh js/css to the container

This PR add a simple and isolated script to upload bokeh.[min].js[css] files to Rackspace.
This helps in the release process and BEP-2 has to be modified accordingly after merging.

ah... I misunderstood you... now it is clear, I agree with you...

http://cdn.pydata.org/bokeh/release/bokeh.0.X.0.js

sounds good...