MS now takes two arguments: a noise generator for m/z and one for intensity
It calls the get method of these, passing the original value and the ms_level
The same object could be used for both
Default is still the NoPeakNoise object
GaussianPeakNoise now has keyword boolean argument log_space which, if set to True will generate the noise on the log of the original, before returning the exp
added a new class: GaussianPeakNoiseSpecificLevels that, instead of a scalar sigma argument, takes a dictionary with key: ms_level and value: sigma. Noise is then added to only those ms_level that have an entry in the dictionary, using the level-specific sigma.
Fixes #69
getmethod of these, passing the original value and thems_levelNoPeakNoiseobjectGaussianPeakNoisenow has keyword boolean argumentlog_spacewhich, if set toTruewill generate the noise on the log of the original, before returning theexpGaussianPeakNoiseSpecificLevelsthat, instead of a scalarsigmaargument, takes a dictionary with key:ms_leveland value:sigma. Noise is then added to only thosems_levelthat have an entry in the dictionary, using the level-specific sigma.