Wed Mar 04 23:58:43 2009  Jiri (George) Lebl <jirka@5z.com>

	* src/graphing.c: add two more style strings to LinePlotDrawLine.
	  First "window" can set the window, with a "fit" being a fitting
	  window.  Also allow drawing of arrows by "arrow" followed by
	  "end", "both", "origin", "none" (done in canvas coordinates, not
	  screen coordinates, not ideal, try zooming)
	
	* src/graphing.c, src/funclib.c: a bit of cleanup, some pointless
	  optimizations, and make sure the graphing functions don't get
	  called during plotting.  Also setting LinePlotWindow,
	  SurfacePlotWindow will change zoom immediately as one would expect

	* help/C/gel-function-list.xml: update



svn path=/trunk/; revision=745