Description:
	Showcasing the use of matplotlib's contourf and contour and calculation of PDF using kde.
File(s) used:
	gmx_files/2dproj_PC1_PC2.xvg
Command:
	plotxvg -f gmx_files/2dproj_PC1_PC2.xvg -contour -kde -showdots -save plotxvg_tests-output/20contour_kde.pdf -noshow
