Shared notebooks with logo stand-in

TIDES team,

I've put a rough sketch of a banner on static rendered notebooks. As we don't yet have a logo, I am using an image from Serendip as a place holder. You can see the current draft on any static rendered notebook; here is Mark's first module:

http://jupyter.physics.brynmawr.edu/hub/mmatlin/public/A%20Brief%20Introduction%20to%20Python%20-%20v1.4.ipynb

Please feel free to give comments and feedback on any aspect so far.

-Doug