Add "molar flow rate" units

[crystal-growth]

Adding few "industrial" units of molar flow rate and corresponding units of AmountOfSubstance:

• standard centimeter per minute,
• standard liter per minute,
• standard cubic foot per minute,
• standard cubic meter per minute,

for standard conditions of 0C and 100000 Pa.

Sometimes some other "standard" conditions are assumed by hardware manufacturers, like T = 20C instead of 0C, or P = 1atm instead of 1 bar.

The units were added to CatalyticActivity quantity, that now occupies dimension AmountOfSubstance/Time.
It may be convenient to add a type alias like MolarRate = CatalyticActivity.

[iliekturtles]

Thanks!