[common.exceptions] added dune-pymor exceptions
[la.container.interfaces] added compatibleTypes()

not 100% sure, that we will need this
[la.container.interfaces] add proper exceptions
[la.container.interfaces] added documentation and default
implementation to VectorInterface
[la.container.dunedynamic] derive DuneDynamicVector from VectorInterface
[la.container.dunedynamic] make use of dune-pymor exceptions
[examples.la] added container example
[la.container.dunedynamic] throw meaningful exceptions
[la.container] updated documentation
[la.container.eigen] derived EigenDenseVector from VectorInterface,
added documentation and proper exceptions
[examples.la.container] update
[test.la_container]
[dune.pymor.la.container] fixed add_VectorInterface()