From Per Nordqvist, "The README.txt is still somewhat confusing so I have updated it"

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14491 16af8721-9629-0410-8352-f15c8da7e697

README.txt

@@ -43,10 +43,9 @@ OpenSceneGraph's CMake build can be found at:
     http://www.openscenegraph.org/projects/osg/wiki/Build/CMake
 
 Under unices (i.e. Linux, IRIX, Solaris, Free-BSD, HP-Ux, AIX, OSX)
-use the cmake or ccmake command-line utils, or use the included tiny
-configure script that'll run cmake for you.  The configure script
-simply runs 'cmake . -DCMAKE_BUILD_TYPE=Release' to ensure that you
-get the best performance from your final libraries/applications.
+use the cmake or ccmake command-line utils. Note that cmake . defaults
+to building Release to ensure that you get the best performance from
+your final libraries/applications.
 
     cd OpenSceneGraph
     cmake .