Merge some of the boostbook changes from trunk.

* XML validity fix for a test.
* Valid docbook lists.
* Updated documentation build settings.
* Fix doxygen problem when two files have the same name. Fixes #1192.
* Avoid including `type` elements in generated docbook.
* Update setup_boostbook scripts.


[SVN r63463]

tools/boostbook

@@ -1 +1 @@
-Subproject commit 6a013b856f457a0ed810bda5cf85f97d2c123ef8
+Subproject commit 4936070d81a9221c6c27db7b403cbb083b1b6502