Fixing List and Instance properties, and adding default kwarg handling to __init__

kwargs to __init__ that don't correspond to actual attributes will now be stashed into __dict__
Implementing serialization in session.py and modifying objects.py correspondingly
Adding support for non-inlined CSS and JS in base.html

This eases debugging the generated JS, so that there aren't MBs of inline JS.
Modifying glyph_example to generate local HTML or use a plot server