add smooth,MSnExp and smooth,Spectrum
add smooth manual pages
export smooth
add pickPeaks,MSnExp and pickPeaks,Spectrum
use spaces around "="
treat empty/missing @centroided as non-centroided spectrum
add manual pages for pickPeaks
export pickPeaks
Merge branch 'next-devel' of github.com:lgatto/MSnbase into next-devel

Conflicts:
	NEWS
	R/methods-Spectrum.R