Updates for IRIX build, and docs updates.

src/osgPlugins/flt/GeoSetBuilder.h

@@ -44,10 +44,6 @@ class DynGeoSet : public osg::GeoSet
     public:
 
         DynGeoSet();
-        
-        virtual osg::Object* clone() const { return new DynGeoSet(); }
-        virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const DynGeoSet*>(obj)!=NULL; }
-        virtual const char* className() const { return "GeoSet"; }
 
         int compare(const DynGeoSet& rhs) const
         {

src/osgPlugins/txp/Makefile

@@ -1,6 +1,5 @@
 #!smake
 SHELL   = /bin/sh
-OSGHOME = $(shell cd ../../..; pwd)
 
 include $(OSGHOME)/Make/makedefs