Added a requirement that values passed into function be type, 'Float'
Intent: Modify script to allow optional arguments and require specific input types
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*internalLoads.py
-Added a 'type' for the value argument to restrict entries to 'float's...
-Changed the name of the argument which takes the unit conversion specifier...
-Added double dash flag to make unit coversion argument optional...

*Ran the script on the command line
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Intent: Modify script to allow optional arguments and require specific input types
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*internalLoads.py
-Changed the name of the unit conversion argument to better reflect it's purpose...
-Added a short version of the optional unit conversion argument...
-Added a line in 'main' to save changed file, name appended with a flag to indicate,
 changed contents...

*Ran the script on the command line
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