Caption mislabelling Figure 2.13 & Figure 2.14

[rjkilpatrick]

The figure labelled 'regular fiber effects' is a ray diagram step-index fibre, and the one labelled 'step index fiber' is a GRadedINdex fibre.

phy485-optics/modernOpticsLecture3.tex

Lines 182 to 187 in ef739f1

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	\imageFigure{../figures/phy485-optics/modernOpticsLecture3Fig8}{regular fiber effects.}{fig:modernOpticsLecture3:modernOpticsLecture3Fig8}{0.2}
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	so that for the GRIN configuration we have something more like \cref{fig:modernOpticsLecture3:modernOpticsLecture3Fig9}.
	\imageFigure{../figures/phy485-optics/modernOpticsLecture3Fig9}{step index fiber.}{fig:modernOpticsLecture3:modernOpticsLecture3Fig9}{0.2}
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