[#803] Extensions

- added min/max values for options
- changeComma -> fixDecimalSeparator
- reformated brackets
- added max java heap size as parameter
- changes error message from MzIDToTSVConverter
- renamed parameter precursor_mass_tolerance_unit to precursor_error_units
- removed unused variable precursor_mz

modified:   ../src/topp/MSGFPlusAdapter.cpp