Docs. Remove "incubating" from software version number on title pages.

docs/en-US/Admin_Guide.xml

@@ -26,7 +26,7 @@
     <bookinfo id="cloudstack_admin">
     <title>&PRODUCT; Administrator's Guide</title>
     <productname>Apache CloudStack</productname>
-    <productnumber>4.0.0-incubating</productnumber>
+    <productnumber>4.2.0</productnumber>
     <edition>1</edition>
     <pubsnumber></pubsnumber>
     <abstract>

docs/en-US/Book_Info.xml

@@ -27,7 +27,7 @@
     <title>&PRODUCT; Guide</title>
     <subtitle>Revised August 9, 2012 10:48 pm Pacific</subtitle>
     <productname>Apache CloudStack</productname>
-    <productnumber>4.0.0</productnumber>
+    <productnumber>4.2.0</productnumber>
     <edition>1</edition>
     <pubsnumber></pubsnumber>
     <abstract>

docs/en-US/CloudStack_Nicira_NVP_Guide.xml

@@ -28,7 +28,7 @@
     <bookinfo id="cloudstack_plugin_niciranvp">
     <title>&PRODUCT; Plugin Guide for the Nicira NVP Plugin</title>
     <productname>Apache CloudStack</productname>
-    <productnumber>4.0.0-incubating</productnumber>
+    <productnumber>4.2.0</productnumber>
     <edition>1</edition>
     <pubsnumber></pubsnumber>
     <abstract>

docs/en-US/Developers_Guide.xml

@@ -26,7 +26,7 @@
     <bookinfo id="cloudstack_developers">
         <title>&PRODUCT; Developer's Guide</title>
         <productname>Apache CloudStack</productname>
-        <productnumber>4.1.0-incubating</productnumber>
+        <productnumber>4.2.0</productnumber>
         <edition></edition>
         <pubsnumber></pubsnumber>
         <abstract>

docs/en-US/Installation_Guide.xml

@@ -25,7 +25,7 @@
   <bookinfo id="book-installation">
     <title>&PRODUCT; Installation Guide</title>
     <productname>Apache CloudStack</productname>
-    <productnumber>4.0.0</productnumber>
+        <productnumber>4.2.0</productnumber>
     <edition>1</edition>
     <pubsnumber/>
     <abstract>