Mass reassign of bugs to dia-maint@bugzilla.gnome.org.

I'm sending a patch to close this bug. 
gnome_window_icon_set_default_from_file() is used. Also, replace
deprecated gnome_init_with_popt_table() with new gnome_program_init().
Add one line to configure.in, too. 

Some other trivial typo fixes are also included in the patch because I
run 'cvs -z3 diff -uN2' in the root directory. Please feel free to
ignore them, or even better, apply them:)

Usually a gnome icon  is in 48x48, while the old dia_gnome_icon.png is
64x63(kinda irregular), so I'm also attaching a rescaled
dia_gnome_icon.png.

Created attachment 9655 [details] [review]
patch

Created attachment 9657 [details]
dia_gnome_icon.png scaled to 48x48

All but the right pointer to the icon was already committed.  It's all there now.  Thanks for the patch!