Epochs/Evoked data handling

[TyWR]

As mentionned in #34 , I could work on the handling of Epochs and Evoked data.

A suggestion for the changes in the structure of the code would be

• Change model.current['raw'] to model.current['data']
• Add a new keyword model.current['type'] set to 'raw', 'epochs' or 'evoked' depending on the type of data loaded.
• Add an epoching window close to

[cbrnr]

Sounds good. I assume creating epochs is based on events, right? Is it possible to select multiple event types? Maybe "Choose Marker" should be reworded to "Event type" to be more consistent with MNE terminology. Also, maybe we should have some defaults for the interval values (e.g. -1 and 1s).

[mmagnuski]

The defaults for interval values could be the same as in mne which is: tmin=-0.2, tmax=0.5.

[cbrnr]

Implemented in #45.