are stored using std::unique_ptr.

[feature] Allow construction of simplices using different simplex element types (only for bisection refinement).

bisection refinement.

Remove ignored const in hsfc.hh

This fixes an ignored-qualifiers warning for this const from Clang.

See merge request !13

with cmake library creation.

the test refines a 3d ball with a projection
and calculates the error to the real ball
this should reduce over refinement

Make compile with zlib in a nonstandard location

`ZLIB_INCLUDE_DIRS` should be `ZLIB_INCLUDE_DIR`. Also, the `dunealugrid` library needs it.

See merge request !11

With this patch, Entity::father, Entity::subEntity,
IntersectionIteratorWrapper::inside and IntersectionIteratorWrapper::outside
return entities instead of entity pointers.

Warning: This will definitely break compatibility with the 2.3 release.

[bugfix][cmake] Fix installation path for cmake modules

The current path installs to: ROOT/share/cmake/modules
It should be: ROOT/share/dune/cmake/modules

See merge request !8

The current path installs to: ROOT/share/cmake/modules
It should be: ROOT/share/dune/cmake/modules

the problem was that the search for the periodic neighbour deletes the periodic
boundary faces from the boundary and the elements get oriented between insertion
and this. So it does not find the elements. Now the search is done after the recreation of
the boundaryIds with respect to the new element orientation

[bugfix] include missing header



See merge request !5

Remove dereference of Entity; fix misleading indentation.

GCC with -Wall will warn about the latter.

See merge request !6