Merge pull request #156 from liminsun/master

The display of MEG reference channels.
corrected scaling
- minor changes in butterflysceneitem and averagewindow
clean up Amp
changed number of decimals
scaling range
- start to implement the new mne browse raw channel info model
- change layout map value from vector to qpointf
- continue working on channel info model
- toolbar creation move to main window
- reduce show window functions to one single function
Merge branch 'master' of https://github.com/mne-tools/mne-cpp
- add channel information window
- add mapping function to chinfomodel
- selection manager works with mapping fuction and chinfomodel
Merge pull request #157 from LorenzE/master

MNE Browse Raw Qt
missing unix include
- add layout maker class
- add simplex minimization class
- selection and average manager support EEG layout plots
- create EEG layout dynamically for loaded EEG channels using the digitizer points and a spherical projection
Merge pull request #158 from LorenzE/master

MNE Browse Raw Qt
unix fix
unix fix
- change butterfly start position to actual value not 0