Adding _RFR folder, plus plots

Put the plots in since there aren't multiple copies of all of them anyway. Looks like the gitignore file worked.

	new file:   _RFR/RFR_ED.png
	new file:   _RFR/RFR_LDO.png
	new file:   _RFR/RFR_MDC.png
	new file:   _RFR/RFR_MDO.png