XFEM: Improved performance.
Forgot two files in previous commit.
Forgot another file in previous commit...
XFEM: Fixed some warnings.
XFEM: Use octrees to avoid looping over all nodes/elements in XFEM routines. Gives very good speedup for cases with many enrichment items.
XFEM: Fixed some warnings.
Domain: Added map from an elements label to its location in the element
array.
Element: Made giveDofManArray() const.
XFEM: More speed-up.