XFEM: Gathered crack tip data in a struct.
Forgot some files in previous commit.
Merge branch 'master' of git://github.com/Micket/oofem

Conflicts:
	src/oofemlib/xfem/enrichmentdomain.C
	src/oofemlib/xfem/enrichmentdomain.h
	src/oofemlib/xfem/enrichmentitem.C
	src/oofemlib/xfem/enrichmentitem.h
	src/oofemlib/xfem/xfemelementinterface.C
Implemented UserDefDirichletBC. The prescribed value is calculated from
a Python script, see userdefdirichletbc.h for more info.
Commented out extra Boost path.