Removed call to obsolete origin parameter in voigt component
Fixes #62 by contraining MPL version to be >= 0.12
BUG-FIX: Signal.sum and Signal.mean where not working as expected when axis < 0
BUG-FIX: fit_background was causing the raise of an exceptiong when the model contained no active background component
Move SpectrumSimulation.apply_gaussian_filter to the Spectrum class, rename it to gaussian_filter, make it work when the signal axis is not the last one and take FWHM in the spectrum axis units
Merge branch 'master' into plot_components
Merge branch 'plot_components' of github.com:hyperspy/hyperspy into plot_components