Resolve "Conversion warnings after pe C++14 adaptions"

Closes #64

See merge request walberla/walberla!119

Resolve "std::array support for send / recv buffer shift operators"

Closes #59

See merge request walberla/walberla!109

Resolve "get pe c++14 ready"

Closes #58

See merge request walberla/walberla!108

using smart pointers instead

Resolve "CMake changed MPIEXEC variable"

Closes #63

See merge request walberla/walberla!114

missing cuda tag now implies WALBERLA_BUILD_WITH_CUDA=OFF

Resolve "missing virtual dtor in base classes"

Closes #62

See merge request walberla/walberla!113

Use variadic template in MakeBlockDataInitFunction

See merge request walberla/walberla!111

Remove BOOST_FOREACH macro and replace range-based for

See merge request walberla/walberla!112

Replace boost::bind with std::bind

See merge request walberla/walberla!110

Part of issue #48