add ipython notebooks

[udibr]

I also modified load.py to work with the file names as they appear in Yan Lecun web site

[Slater-Victoroff]

@Newmu Any word on this? I would love to see integrated.

[syzer]

+1

[Newmu]

Apolgoies for the delay, did not know ipython notebook and dragged my feet on this.

@udibr Madison did some wording editing on top of these notebooks and if you'd like to sign off there's another pull open for them here: #3