From Mikkel Gjøl, addition of paramter set/get methods to osgGA::*Manipulators,

change of ' ' to GUIEventAdapter::KEY_Space, fix to url in Matrix_implementation.cpp.
Syntax fixes by Robert Osfield to above submission fix inconsistencies with normal
OSG coding style.

src/osgGA/TrackballManipulator.cpp

@@ -136,7 +136,7 @@ bool TrackballManipulator::handle(const GUIEventAdapter& ea,GUIActionAdapter& us
         }
 
         case(GUIEventAdapter::KEYDOWN):
-            if (ea.getKey()==' ')
+            if (ea.getKey()== GUIEventAdapter::KEY_Space)
             {
                 flushMouseEventStack();
                 _thrown = false;