Tahoe Code SVN development

updates

check if ff > 0, but lambda is not positive. ComputeOutput passes the initial values of internal variable if ff < 0 or ff > 0, but lambda is zero

updates on NodalYieldCheck and ComputeNodalYield functions

updates

Updated files for new cohesion softening law.

updates; problem with stress correction when yield condition at ip is satisfied for the first time, but plastic multiplier's value is still zero

updates

some file systems don't have /dev/null

penalty number computed based on the Klambdalambda matrix

update ApplyLambdaBC function