Adds Dockerfile to build docker instance for coLaboratory
Fixes Dockerfile
Adds bokeh to dockerfile
Add yt library to Dockerfile
Adds README for docker build
Add Cython to dockerfile

Cython is required to build yt
Use ADD command to include coLaboratory repo
Update Dockerfile
Remove unused README.md file
Merge pull request #92 from KesterTong/docker

Adds a Dockerfile for docker build of coLaboratory