converting quantities between different units
used as reference: https://www.isa.org/uploadedFiles/Content/Training_and_Certifications/ISA_Certification/CCST-Conversions-document.pdf
Class ConversionFactorDefinition has all defined conversion factors, like
AddConversionFactor("meter", "feet", 3.28084); AddConversionFactor("meter", "inch", 39.3701); AddConversionFactor("feet", "inch", 12); ...
Any additional unit conversion definition should be added there. Ideally this set of conversion factors should be defined in some config file.
Class PrefixDefinition - contains list of supported SI prefixes and their multiplication values