Changed name of Sparse data notebook
First commit of plots module, with a raster plot.
Added plots and process_data function to spare module namespace.
Commiting newest notebook versions
Added functions lock_spikes and process_data.
Added load_daq and load_exper functions.  Refactored load_file to use the new functions.

I had a problem loading the experiment protocol data.  Different
experiments have different protocols with different formats.  So, I had
to find a more general method for loading in the data.  The data is
some struct with a bunch of variable fields.  It records the fields,
and if one is 'param', looks through the fields there too.  It gets the
data types of the fields too, and uses the field names and data types
to build a record array.