1st draft of mne example

[LuyandaMdanda]

@TomDonoghue asked me to work on an example of plotting topologies using mne.

[TomDonoghue]

Comment - extra code for the epochs version

###################################################################################################
# Alternative epoching methods 
# ----------------------------
# 
# Antother way to epoch your data based on time by averaging across events as opposed to
# selecting specifc time sections.

###################################################################################################

tmin, tmax = -0.2, 0.5
epochs_params = dict(events=events, event_id=event_id, tmin=tmin, tmax=tmax,
                     reject=reject)
epochs = mne.Epochs(raw, **epochs_params).average()

[TomDonoghue]

Okay, so this is partly waiting for a doc-site rebuild to get re-built to go live, but no reason not to merge it in now!

Thanks @LuyandaMdanda for great work here!