add normalize,Spectrum2 and corrseponding precursor normalization method
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
add simple test cases for smooth and pickPeaks
add missing SNR documentation
Merge branch 'next-devel' into matching

Conflicts:
	NEWS
	R/AllGenerics.R
	R/functions-Spectrum.R
	R/methods-Spectrum.R
add missing parenthesis
MALDIquant is now a dependency and we can use its .which.closest instead of copying the code
add calculateFragments
add matchPeaks and matchFragments
remove useless matchFragments
test for tolerance below zero
move plotSpectrumVsSpectrum to plotting-Spectrum.R