Updated index.html with dependacy info about the new osgText library.

Modified osg/Drawable::draw(..) so that it uses display list COMPILE
rather than COMPILE_AND_EXECUTE to solve performance problems under
NVidia drivers.  The old behavior is still available by comments out
a #define.
Fixed the default compilation list src/osgPlugins/Makefile so that it
compiles by defalt png and gif.

include/osg/Drawable

@@ -22,7 +22,13 @@ class Vec2;
 class Vec3;
 class Vec4;
 
+// this is define to alter the way display lists are compiled inside the
+// the draw method, it has been found that the NVidia drivers fail completely
+// to optimize COMPILE_AND_EXECUTE in fact make it go slower than for no display 
+// lists, but optimize a seperate COMPILE very well?!  Define it as default
+// the use of a sperate COMPILE, then glCallList rather than use COMPILE_AND_EXECUTE.
 
+#define USE_SEPERATE_COMPILE_AND_EXECUTE
 
 /** Pure virtual base class for drawable Geometry.  Contains no drawing primitives
     directly, these are provided by subclasses such as GeoSet. State attributes 
@@ -232,10 +238,19 @@ inline void Drawable::draw(State& state)
         }
         else if (_useDisplayList)
         {
+#ifdef USE_SEPERATE_COMPILE_AND_EXECUTE
+            globj = glGenLists( 1 );
+            glNewList( globj, GL_COMPILE );
+            drawImmediateMode(state);
+            glEndList();
+            
+            glCallList( globj);
+#else
             globj = glGenLists( 1 );
             glNewList( globj, GL_COMPILE_AND_EXECUTE );
             drawImmediateMode(state);
             glEndList();
+#endif
         }
 
     }