renamed Jamfile.v2 to Jamfile and updated the docs

[SVN r36379]

doc/Jamfile

@@ -0,0 +1,16 @@
+project boost/libs/fusion/doc ;
+import boostbook : boostbook ;
+using quickbook ;
+
+boostbook quickbook
+    :
+        fusion.qbk
+    :
+        <xsl:param>boost.root=../../../..
+        <xsl:param>boost.libraries=../../../libraries.htm
+        <xsl:param>chunk.section.depth=4
+        <xsl:param>chunk.first.sections=1
+        <xsl:param>toc.section.depth=3
+        <xsl:param>toc.max.depth=1
+    ;
+