Wed Oct 16 00:33:17 2013  Jiri (George) Lebl <jirka@5z.com>

	* src/symbolic.c: add some derivatives for Bessel functions and
	  for the Lambert W functions

	* help/C/genius.xml: document LambertW, LambertWm1, NewtonsMethod,
	  and some other minor improvements

	* lib/equation_solving/newton.gel, lib/functions/elementary.gel:
	  improve help string for the Newton's method functions

	* pixmaps/Makefile.am: pass -t to gtk-update-icon-cache to avoid
	  failing if no theme index file