(calms down clang warning)

[[Imported from SVN: r7113]]

Make bigunsignedint hashable using Dune::hash

This patch adds the required hooks to enable hashing of bigunsignedint
and makes sure the hasher can be invoked in bigunsignedinttest.

Making bigunsignedint hashable also makes it possible to use hash-based
containers for EntityIDs with YaspGrid and SGrid, as those grids implement
the EntityID as a plain bigunsignedint.

The patch also adds a little test to bigunsignedinttest, trying to hash
a bigunsignedint with Dune::hash as well as any of the detected backends
(std::hash and std::tr1::hash).

Kudos to Steffen Müthing, see FS#1192

[[Imported from SVN: r7066]]

revert r6278 and r6277 - if possible we should not keep the trunk dysfunctional for more than a few hours (I need alugrid)

[[Imported from SVN: r6280]]

specify types as typedefs.

[[Imported from SVN: r6277]]

[[Imported from SVN: r6249]]

[[Imported from SVN: r6220]]

[[Imported from SVN: r6214]]

[[Imported from SVN: r6033]]

[[Imported from SVN: r5738]]

[[Imported from SVN: r5714]]

* update Makefiles and configure

[[Imported from SVN: r5643]]

[[Imported from SVN: r5579]]

pointing this out.)

[[Imported from SVN: r5578]]

Otherwise on some 64bit platforms we run into trouble.

[[Imported from SVN: r5576]]

[[Imported from SVN: r5253]]

[[Imported from SVN: r5224]]

[[Imported from SVN: r5152]]

[[Imported from SVN: r4537]]

[[Imported from SVN: r4517]]

[[Imported from SVN: r4377]]

[[Imported from SVN: r4363]]

      assert(globalid.id(*e) >= 0);
don't work.

[[Imported from SVN: r3333]]

returns just the lowest 32 bits

[[Imported from SVN: r3324]]

[[Imported from SVN: r3248]]

[[Imported from SVN: r3220]]

[[Imported from SVN: r3086]]

[[Imported from SVN: r2937]]

[[Imported from SVN: r2870]]

[[Imported from SVN: r2853]]

[[Imported from SVN: r1949]]