moved the deprecated topology classes to a separate header. The header is included in types.hh for the current release without deprecation warnings but after the 2.8 release the header 'deprecated_topology.hh' will need to be included which contains deprecation warnings.

construction in "dune/geometry/topologyfactory.hh" and "dune/geometry/type.hh".

Prepared transition from `Topology` template parameter to
`GeometryType`.

The old Topology construction based on template recursion via the
structs `Point`, `Pyramid` and `Prism` is dated.

The AxisAlignedCubeGeometry has always had a constructor that was always
intended to be used with dim==coorddim only.  However, this precondition
was never checked anywhere, which could lead to strange bugs.
This patch introduces a static_assert that fails at compile time
if the dim==coorddim precondition is not met.

BUG: core/dune-geometry#25

An test the method and type in the unit test.

As decided at the 2018 dev meeting in Stuttgart.

This constructor (and its cousin GeometryType(uint)) are not
really needed with the new way to construct GeometryType objects.

As there are still some use cases that cannot be easily switched from using GeometryType::Basictype
to plain GeometryType, revert its deprecation for the 2.6 release.

This does **not** revert the deprecation of the GeometryType constructor from BasicType.