Tahoe Code SVN development benchmark

removed	/branches/excavation/ABAQUS
removed	/branches/excavation/AG_element
removed	/branches/excavation/DEM_cavity_expansion
removed	/branches/excavation/DEM_coupling
removed	/branches/excavation/DEM_tom
removed	/branches/excavation/SMP
removed	/branches/excavation/Sierra
removed	/branches/excavation/aps_grad
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removed	/branches/excavation/contact_cohesive
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removed	/branches/excavation/nodal_rigid_CSE
removed	/branches/excavation/ocular_tissue
removed	/branches/excavation/one_el_contact
copied	/trunk -> /branches/excavation