Added pkgadd distribution for Solaris.

Added a cleaner way to install demo source so that installed versions use a
simplified makedefs/makerules.

Small fix to get osgText to compile with Solaris CC.  Constructor declared
with a non-const argument, but implemented with const argument.

src/Demos/osgversion/Makefile

@@ -6,6 +6,10 @@ CXXFILES =\
 
 LIBS     += $(OSG_LIBS) $(GLUT_LIB) $(GL_LIBS) $(X_LIBS) $(OTHER_LIBS) 
 
+INSTFILES = \
+	$(CXXFILES)\
+	Makefile.inst=Makefile
+
 EXEC = osgversion
 
 include $(TOPDIR)/Make/makerules