Merge branch 'master' into feature/add-kernels

synchronize with master

* master:
  [Autotools] Add test for C++11 alignof operator
  [Autotools] Check for alignment values of various simple types
  [Buildsystem] Provide macros for explicitly marking symbols as exported or private
  Switch to a more robust algorithm for hash combining
  Cirrected copy&paste comment
  [Buildsystem] Allow specification of USE_CMAKE in opts file.
  Fixes indentation.
  [Buildsystem] Honor --buiddir option for dunecontrol again.
  [CMake] Get rid of warnings related to CMP0019: skip include/link variable re-expansion
  [dunecontrol] Fix variable name mixup in vcsetup option file parsing
  Deprecate TypeTraits::PointeeType and TypeTraits::ReferredType
  Implement is_pointer, is_lvalue_reference, remove_pointer
  Put programs in alphabetical order
  Test the TypeTraits class
  spelling
  Fixes BUILDDIR variable treatment in opts file.