XFEM: Implemented automatic treatment of crack intersections.
XFEM: Capture intialization error in enrichment fronts.
PrescribedGradientBCNeumann: Implemented computeField.
XFEM: Fixed some errors in treatment of intersecting cracks.
XFEM: Fixed small error for intersecting cracks and added some checks.
Made the file name in the error checking module optional.
XFEM: Removed a few unused variables.
Merge branch 'master' of https://github.com/Micket/oofem