Push trunk to 1.9 version information everywhere

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@4498 dfc29bdd-3216-0410-991c-e03cc46cb475

include/irrlicht.h

@@ -187,7 +187,7 @@
 #include "vector2d.h"
 #include "vector3d.h"
 
-/*! \mainpage Irrlicht Engine 1.8 API documentation
+/*! \mainpage Irrlicht Engine 1.9 API documentation
  *
  * <div align="center"><img src="logobig.png" ></div>
  *

readme.txt

 ==========================================================================
-The Irrlicht Engine SDK version 1.8
+The Irrlicht Engine SDK version 1.9
 ==========================================================================
 
   Welcome the Irrlicht Engine SDK.