Simplify install

[wernight]

Very nice but under presented.

I would update README to include:

• Link to demo http://bids.github.io/colormap/
• Link to presentation recording https://youtu.be/XjHzLUnHeM0
• Simple install/usage for iPython
• Link to https://github.com/matplotlib/cmocean

[njsmith]

Thanks for the report, and sorry I missed it before... apparently I had github notifications turned off for this repo; no idea how that happened!

Please feel free to submit a pull request