[common.exceptions] added pymorWhat() for python bindings
[dune.pymor.common] added add_PymorExceptions()
[dune.pymor.core] create exceptions
moved dune-pymor.common -> dune.pymor.common.exceptions
[common.exceptions] renamed not_implemented_for_this_combination
to types_are_not_compatible
[common.exceptions] added key_is_not_valid
[dune.pymor.la.container] added exceptions
[examples.la.container] added exceptions
[parameters.base] added ParameterType
[parameters.base] added documentation and output to ParameterType
[test.parameters_base] added
[dune.pymor.core] updated