Meggie

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- Fix channel average plots with non-orthodox channel groups

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- Fix issue with channel selection saving

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- Add 19 tests.
- Improve exception handling and logging
- Make plugin loading more robust
- Fix tab ordering of main window
- Channel average plots for each channel type are put into single figure
- Fix tse baselining for channel averages
- Sorted conditions in topo plot and channel averages
- Try to use default channel groups if channel groups not set
- Fix regexp for next_available_name
- Allow delay in epoch creation

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- Update mne dependency to >=0.22.0

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- Remove workspace attribute from experiment and use path instead
- Do not require comment attribute to be set when creating Evoked
- Try to get default channel groups from active subject if channel groups not set
- Add tests for utilities, experiment.py, subject.py and datatypes
- Remove old stc code to separate branch
- Add new import possibilities by using read_raw instead of read_raw_fif
- If both EEG and MEG data present, show both when plotting topography
- Add event delay for epoch creation
- Fix mne_wrapper pkgutil bug
- Improve exception messaging in many places

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- Fix broken import