Initial for MIMO parameter plots

This script was created to plot MIMO parameters given the S parameters
and gain patterns of a given 2 antenna antenna system. It is not auto-
mated for an arbitrary setup (different numbers of antennas, different
number of gain frequencies used, different antenna bands, etc.).

To do:

	- Plot MEG vs. XPD for more values of XPD (-40dB -> +40dB)

	- More automation on file selection (GUI prompt)

	- Allow more/arbitrary amount of frequencies for MEG calculation

	- Have a best guess of antenna bands from a computer check of
	  dB(Snn) instead of manually inserting

	- Better instructions (or just a more intuitive GUI with small
	  help/reminder notifications)