Added initial implementation of linearconstrainbc
Merge branch 'master' of www.oofem.org:/data/git/oofem
Removed meaningless MatResponseForm argument from give3dMaterialStiffnessMatrix.
Added GradDpMaterialExtensionInterface to trabbonegrad3d as well.
Merge branch 'master' of www.oofem.org:/data/git/oofem
Merge branch 'master' of git://github.com/Micket/oofem

Conflicts:
	src/sm/misesmat.C
	src/sm/structuralmaterial.C