Add some XSTL transformations to normalize the embedding of other boostbook docs for things other than libraries so that they are integrated as chapters when the top level docs get generated.

[SVN r31683]

doc/src/boost.xml

@@ -749,9 +749,23 @@
 
   </part>
 
-  <xi:include href="../../tools/boostbook/doc/boostbook.xml"/>
-  <xi:include href="../../tools/build/v2/doc/src/userman.xml"/>
-  <xi:include href="bjam.xml"/>
+  <part id="tools">
+    <title>Boost Tools</title>
+    <para>
+      Boost developers, testers, and maintainers have developed various programs to 
+      help with the administration of the Boost Libraries. Like everything else about 
+      Boost, these tools are available in source form, and are part of the regular 
+      Boost distribution.
+    </para>
+    <para>
+      Users may find these tools useful when porting Boost libraries to a new platform, 
+      or for use with their own applications.
+    </para>
+
+    <xi:include href="../../tools/boostbook/doc/boostbook.xml"/>
+    <xi:include href="bjam.xml"/>
+    <xi:include href="../../tools/build/v2/doc/src/userman.xml"/>
+  </part>
+  
   <xi:include href="using.xml"/>
 </boostbook>
-

tools/boostbook

@@ -1 +1 @@
-Subproject commit aa84fd9b1e49b0cb65d76aa2df43340dad8d96f4
+Subproject commit 99c053140e67598f68b22c150b5865eac7b75601

tools/build

@@ -1 +1 @@
-Subproject commit d5dd6a8057cdd4db582b46782d7f1fde3576ab90
+Subproject commit 7dcf885aec00e923a57246f27556284c0bf1152e