import Dune's class name code
Import the property system from eWoms
add authors to the files according to git logs
add a test for the property system
make sure the header files related to the property system are installed
add Exceptions.hpp to the list of public header files
className(): remove unused argument object for the className(foo) variant

some compilers may warn about this under some circumstances.
className(): get rid of the ugly ClassNameHelper_ class

since full specialization of function templates is okay in C++ (only
partial specialization is not allowed for them).
className(): minor comment and guard macro name fixes
Merge pull request #344 from andlaus/import_propertysystem

Import propertysystem
remove 'constexpr' from the property system

it is not really needed and unneccessarily breaks the build on gcc-4.4
Merge pull request #383 from andlaus/remove_constexpr_in_property_system

remove 'constexpr' from the property system
include <tuple> in Spline.hpp

it seems like this is implicitly included by some other header, but
only in debug mode. *grr* thanks to @bska for catching this...
Merge pull request #384 from andlaus/include_tuple

include <tuple> in Spline.hpp