Modified giveBoundaryLocationArray and computeBoundaryUnknownVector to work with surfaces and edges.
Fixed bug with internal dof managers and boundary b.c.s
Merge branch 'master' of github.com:Micket/oofem

Conflicts:
	src/oofemlib/mixedgradientpressureneumann.C
	src/oofemlib/mixedgradientpressureweakperiodic.C