added accumulatedshear as output for twin and slip

code/config/Phase_Phenopowerlaw_Aluminum.config

@@ -6,10 +6,12 @@ plasticity              phenopowerlaw
 (output)                resistance_slip
 (output)                shearrate_slip
 (output)                resolvedstress_slip
+(output)                accumulatedshear_slip
 (output)                totalshear
 (output)                resistance_twin
 (output)                shearrate_twin
 (output)                resolvedstress_twin
+(output)                accumulatedshear_twin
 (output)                totalvolfrac
 
 lattice_structure       fcc