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.
without the http:// here the link is treated as relative (e.g., `http://localhost:8888/www.pycogent.org`). This could perhaps be a version issue -- I'm using IPython 1.1.0