Fix tdevelop doctype declaration for future maintenance of handbook files.

This partially resolves bug report 694.

doc/kde_app_devel/index.docbook

@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY tdevelop "<application>KDevelop</application>">
   <!ENTITY kappname "&tdevelop;">
   <!ENTITY % addindex "INCLUDE">

doc/kdearch/index.docbook

@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY % addindex "INCLUDE">
   <!ENTITY % English "INCLUDE" > <!-- change language only here -->
 ]>

doc/tdevelop/index.docbook

@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
 <!--   <!ENTITY tdevelop "<application>KDevelop</application>"> -->
   <!ENTITY tdevelop "KDevelop">
   <!ENTITY kdevrelease "3.3.91">

parts/appwizard/common/kde-index.docbook

@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY %{APPNAMELC} "<application>%{APPNAME} %{VERSION}</application>">
   <!ENTITY kappname "&%{APPNAMELC};"><!-- Do *not* replace kappname-->
   <!ENTITY package "kde-module"><!-- tdebase, tdeadmin, etc -->