Update gcc build instructions. Mention gettext is GPL.

Update gcc build instructions. Mention gettext is GPL.

	* README.win32: Update gcc build instructions. Mention gettext is
 	GPL.

	* gdk/win32/gdkcursor.c (gdk_cursor_new_from_pixmap): Get correct
 	supported cursor size with GetSystemMetrics.

	* gdk/win32/gdkfont.c
	* gtk/gtkfontsel.c: Guard against some font weight and charset
 	symbols being undefined (in mingw32 headers).

	* gdk/win32/makefile.cygwin
	* gtk/makefile.cygwin
	* gtk/gtkthemes.c: No longer need to have differently named
	gcc-built DLLs when using gcc-2.95 and -fnative-struct.