Fixes a javascript crash when exporting notebooks with multiple scenes, and updates ganja.js to use the new line renderer.

Improved js handling, bumped ganja.js version, algebras get passed through to ganja.js with no filter

Pushed in preparation for a presention in Brno

In this release:

• Updated ganja.js
• Fixed compatibility with older jupyter
• Notebook output no longer blurs on window resize
• pyganja.__version__ to inspect the version number without needing to invoke pip
• Better behavior when installed from source

Better support for 2d CGA

Fixes #34

Fixed duplicated views in rendered notebooks, updated ganja.js to latest