Some progress w.r.t access to HDF5 .KWIK file and plotting... something :P

Here's a view on what it looks like to access HDF5 `EArray` and plotting some stuff...

http://nbviewer.ipython.org/github/brainstorm/hdf5-and-spark/blob/master/Spark%20%2B%20HDF5.ipynb

@rossant, maybe you are interesting in this too? ;)