EDF testing and MATLAB modification

[arnodelorme]

Look at the important changes in the eeglabcompat class:

• I have made MATLAB and Octave use the same code to avoid inconsistencies (Oct2py object are not fully compatible with EEG datasets defined in Python -- events are struct array instead of array etc...). In the end the percentage of usage will be low so it is not worth it to maintain the Octave interface separately from MATLAB (plus if you look internally into Oct2py the files are resaved anyway).
• I have added a list of function that return EEG datasets although they do not take one as input
• I have added a test function to compare EDF files

[chkothe]

I think we're good to go, merging. Agreed that deduplicating Octave/Matlab is a good idea, and that interface code is going to evolve as it's already.