Fix of mergeconflicts
Created class StaticFracture, intended for simulation of quasi-static crack propagation. Should be developed.
Playing around with having a non-static system intended for crack propagation
Copied some necessary methods regarding update of DofUnknownsDictionary
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
Working on improving the export of composite elements
Refined the composite export somewhat
Renamed layerIntegrationRulesArray to integrationRulesArray such that the gp will be automatically updated

Added ZZ recovery for Shell7Base
Added export of nodal variables
Merge branch 'xfemtest' into XFEMDevelopment

Conflicts:
	src/oofemlib/vtkxmlexportmodule.C
	src/oofemlib/xfem/enrichmentdomain.h
	src/oofemlib/xfem/enrichmentitem.C
	src/oofemlib/xfem/xfemmanager.C
	src/oofemlib/xfem/xfemmanager.h
	src/sm/planstrssxfem.C
	src/sm/shell7base.C
	src/sm/shell7base.h
	src/sm/shell7basexfem.C
	src/sm/tr2shell7.C
	src/sm/tr2shell7xfem.C
Added beColumnOf to extract a given column from a matrix
+Restructuring in Shell7Base such that base vectors are stored in as a matrix instead of vector by vector. Not all files has been rewritten yet.

+Some optimization of the code
Some cleaning up in shell7base
Added support for constant edge load for Shell7BaseXfem
Fixed a bug with not numbering the Gauss points
Added updateYourself for StaticFracture + computation of interlaminar stresses (should be moved to another class later)