noise estimation stabilization - still some issues
Merge branch 'master' of https://github.com/mne-tools/mne-cpp
Merge pull request #152 from LorenzE/master

MNE Browse Raw Qt
- Add butterfly scene and item class
- Change ChannelSceneItem to SelectionSceneItem
- add butterfly plot functionality
Merge branch 'master' of https://github.com/mne-tools/mne-cpp