[cmake] simplify add_dune_..._flags() usage
[cmake] add_dune_tbb_flags()
Merge branch 'master' into OS2014

Conflicts:
	examples/linearelliptic/CMakeLists.txt
replace static_assert include
Merge branch 'master' into OS2014
[examples.linearelliptic.cg] default to dune-fem space backend, refs #7
[linearelliptic.problems.OS2014] add FiveSpot
[linearelliptic.testcases.OS2014] add parameter_range
[linearelliptic.testcases.os2014] add FiveSpot
[examples.linearelliptic.OS2014] corretly set parameter range
[examples.linearelliptic.os2014] bind FiveSpotExample
[examples.linearelliptic.os2014] do not precompute some products
[examples.linearelliptic.os2014] update dataset key
[linearelliptic.problems.default] make available for the provider
[linearelliptic.estimators.block-swipdg] add parameter range

This is used to determine the minimal diffusion on an entity.
Merge branch 'master' into OS2014