#19 Creating hardware meshes

[Bryon Hapgood]

Currently there is no member function of sg::DAG to
generate all its hardware equivelents.

In otherwords LOD.h is NULL which causes the renderer
not to draw anything.

[Bryan Wagstaff]

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I think this is fixed with the new release.

At least, it is fixed with respect to lod.h and lod.s.

bryanw.