Add the version to the Makefile

Not quite the same format as for the kernel, but I want to do the normal
"edit the makefile before making a release" model that I'm used to.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Makefile

@@ -1,3 +1,5 @@
+VERSION=1.0
+
 CC=gcc
 CFLAGS=-Wall -Wno-pointer-sign -g
 INSTALL=install
@@ -68,6 +70,7 @@ libdivecomputer.o: libdivecomputer.c dive.h display.h display-gtk.h libdivecompu
 gtk-gui.o: gtk-gui.c dive.h display.h divelist.h display-gtk.h libdivecomputer.h
 	$(CC) $(CFLAGS) `pkg-config --cflags gtk+-2.0 glib-2.0 gconf-2.0` \
 			-I$(LIBDIVECOMPUTERINCLUDES) \
+			-DVERSION_STRING='"v$(VERSION)"' \
 			-c gtk-gui.c
 
 uemis.o: uemis.c uemis.h

gtk-gui.c

@@ -362,7 +362,7 @@ static void about_dialog(GtkWidget *w, gpointer data)
 		"program-name", "SubSurface",
 		"comments", "Half-arsed divelog software in C",
 		"license", "GPLv2",
-		"version", "1.0",
+		"version", VERSION_STRING,
 		"copyright", "Linus Torvalds 2011",
 		/* Must be last: */
 		logo_property, logo,