Determine how Fahrenheit and Celsius should be handled in input files.

[kbuma]

The documentation states that:

Aspen Plus and ACM both take F and C as the symbols for Fahrenheit and Celsius. By the international standard F and C represent Farads and Coulombs, °F and °C represent Fahrenheit and Celsius. SimSinter does not accept F and C for Fahrenheit and Celsius; however, a number of symbols are permitted. For example, Celsius can be represented with °C, degC, deg_C, degree_Celsius, celsius, degree_C, degrees_C, degree, degreesC, degsC, and degs_C. SimSinter, SinterConfigGUI, defaults to “degC” to represent Celsius.

Need to determine whether this is still true without Unit Conversion and whether this needs to be supported if not.