add option of no viscosity for thermo-elastic analysis
changed directories for VISCOELASTIC_MATERIALS_DEV
require cornea materials to reqire VIB_MATERIAL flag
add flag to require VIB_MATERIAL flag
initial checkin of SMP material
Changing back to Revision 1.6.
Changing the equation of stiffness.
G3 and H3 tangent operators implemented.
Changing the check for yield back.
G3 and H3implemented.
