Add the subsection on (finally!) calculating the dust density maximum. It's simply max(rho_d) = rho0*epsilon * (S+1), where rho0 is the maximum gas density, epsilon the global dust to gas ratio, and S=St/delta.
Merge branch 'master' of git://github.com/wlyra/transitional-disk

Conflicts:
	tex/trapping.tex
Added nonaxi to the Makefile.