XFEM: Prepared for multiple cracks through one element.
Triangle: added function that checks if a point is located inside a
triangle.
XFEM: Continued implementation of multiple cracks.
XFEM: Added test case for multiple cracks in one element.
XFEM: Deactivated debug vtk output.
XFEM: Cleaned up some code and added option in XFEM manager for
controlling debug output.
XFEM: Applied uncrustify on some xfem files.
Merge branch 'master' of https://github.com/Micket/oofem