addition of SciPy2014 talk

**NOT READY FOR MERGE** 

Just posting for easy review by others. Note that this makes use of the code in [@fperez's nb-slideshow-template](https://github.com/fperez/nb-slideshow-template). The ``install-support.ipynb`` notebook from that repo will need to be run once, prior to this presentation working in slideshow mode.
Worth mention of travis too?