added elements() forwards declartion for segments, added itertor<> specialization for const container/range/...
adapted to new interface (coord_type -> coord)
normal_vector doesn't need domain
added domain_t::clear()
Added operator= for range proxy
added missing template keyword (clang 3.2)
fixed bug (one tetrahedron creation was missing in apply2_1)
changed unsigned int for template parameter to int (fixes clang 3.2 compiler error when using -1)
Fixed const_element_range (is an object for const container and not const itself)
added refinement for segmentations (TODO: better implementation)
adapted to new interface, renamed copy_domain -> copy_cells
bugfix in operator= (element container collection of this was not cleared)
added segment_id_range for elements (to query in which segments an element is), added clear method for segmentation
Ported algorithm for seed point segmenting to new interface