Create entry for 1.5 in the change log.

Starting it of with some of the changes that have been made to quickbook
since 1.4 - considering the first 1.4 release as the proper 1.4 release.

[SVN r55906]

tools/quickbook

@@ -1 +1 @@
-Subproject commit 4826a25212a5dfb24d68df55bf4c031caca6680c
+Subproject commit cf94d249768311f58433ce738843c981328e1b1e