Added to package
Added the batch_process decorator and common_reference function.
Fixed a bug in the scatter methods of Viewer.  Changed cluster objects to return self if select is called with None.

Bug in scatter methods due to feature arrays being 0-indexed while I
think of components starting at 1.
Newest version
Changed plot_colors to get_colors.
Added doctrings to fit_pca and fit_ica
Added a bit in batch_process to only do multiprocessing if the data is contained in a list or generator.
Added code in load_data to convert from bits to voltage.
Spike detection section, first version
Newest version
Did a lot of work here, so commiting this version which is working as far as I know.

Added map_parallel which uses a pool of workers to map data to a
function in parallel.  Speeds up the work a bunch.  However, don't use
it in an IPython notebook.

Also wrote a pair of functions to save and load spike data.
Minor change