Log Message:
update to gerbv-1.01.  Condensed change log:
	* src/draw_amacro.c: Forgot to copy gc to local_gc
	  so drawing inherits gc from image wide setting.
	  Pointed out by Warren Young.
	* src/gerbv.c: malloc strlen+2, not +1
	* src/gerb_file.c: malloc len+1, not len
	* src/draw.c: When drawing circles I ignored if circle
	  had inner diameter, which was pointed out by Harry Eaton.
	  Not anymore... Closes bug #1050340 in this branch.
	* src/draw_amacro.c: Forgot to use local_gc when drawing some
	  of the primitive aperture macros. Closes bug #1051045.
	* src/gerbv.c: If you tried to invert color of an unloaded layer
	  you got a segmentation fault. I think it was discovered by Juergen.
	* configure.in, src/Makefile.am: Use libpng-config to find out
	  parameters to use in CFLAGS and LIBS.
        * src/gerbv.c: Made sure that only list of short options is
          printed when only short options are compiled in.
	* doc/*, example/*: Makefiles.am removed Makefile.in wheh running
	  distclean. Not good. Spotted by Hamish Moffatt when packaging
	  for Debian.
	* src/draw.c: In gerbers the image can be negative or positive.
          Then a part of the image called a layer can be clear or dark.
          -"No more weed for you, Mr Gerber".
          Richard Lightman found this and submitted both an example and
          a patch. Thanks!
	* src/draw_amacro.c: When drawing thermals the cross ends in butt
	  instead of round which gives nicer look when thermal covers an
	  other via.
	* src/gerber.c: Improved comments on what is going and why. Also
	  improved a little in determining the size of the image. Now it
	  ignores points with no aperture defined, unless it is a polygon
	  area.
	* src/gerber.c: Removed two potential segfaults when running old
	  RS-274D format.

	* src/gerber.c, src/batch.c, src/gerb_image.[hc]: Actually removed
	  all traces of MQ_END and MQ_START. That means that empty nodes
	  with only this information isn't saved, since the only time we need
	  this information is when parsing arcs. When an arc is parsed
	  the information wheter that arc is multi or single quadrant is
	  saved there. Also closes bug #942590.

	* src/gerbv.c, src/gerbv_screen.h, src/gerb_image.c, src/gerb_image.h:
	  Added possibility to dump a parsed image as text to be able to
	  debug the parser.
	* src/draw_amacro.c: By mistake I assumed that all aperture
	  macros had exposure flags, but that was a mistake. Drew Moore
	  pointed it out to me. Thanks.
	* */.cvsignore, man/gerbv.1.in, src/gerbv.c: Minor updates and
	  cleanups from Dimitri. --help added for instance.