[FIX] fixed correct number of proteinhits
[FIX] mzid writing (both stream and dom) fixed technically - not
semantically
[FIX] switched to mzid stream writing, first attempt to handle a huge
family of errors with cv/user params in very custom mzid files
[Feature] added MetaInfo objects to the userparams and the other way
around for mzid write/read
[FIX] corrected mzid header write (id & date)