Put the quickbook version numbers in a single header, along with convenience

functions for using them in spirit grammars.

[SVN r55910]

tools/quickbook

@@ -1 +1 @@
-Subproject commit b23d6a9de76b74e2b03e4515284e6bc833376bc7
+Subproject commit 56e4e76941989de65a00edcd2efcc6ccc4fc6064