Some updates regarding xfem01 test
Included triangulation for subintegration and moved some methods around
Added methods for initialization and update of unknownsDictionary also added update of load vector (basically skipping this)
Added: beReducedVectorFormOfStrain to convert from matrix form to reduced Voight form

Renamed: beReducedVectorForm to beReducedVectorFormOfStress to make it clear that it expects the argument to be stress
Renamed: beMatrixForm to beMatrixFormOfStress  to make it clear that it expects the argument to be stress

Maybe one should include some new stress-strain classes (which includes the above methods) to reduce the number of methods in FloatArray and FloatMatrix.
One can also add methods for converting between different stress and strain measures which becomes important in large deformation theory.
Added method to compute Cauchy stress
Update for a bit more flexible handling of new enrichment dofs
Merge remote-tracking branch 'origin/xfemtest' into XFEMDevelopment

Conflicts:
	src/oofemlib/xfem/enrichmentdomain.h
Modified some comments and fixed a small bug concerning numbering of dofs