[cmake] define HAVE_EIGEN
[la.container.interfaces] disable warnings for dynvector
[test.la_container] rename DuneDynamicVector -> CommonDenseVector
[la.container.eigen] added missing 'return' in non-void dot-function
[test.la_container] added some asserts and added test for operator[]
[la.container.interfaces] added documentation
[test.la_container] renamed check() methods to fulfills_interface()
[test.la_container] added produces_correct_results() method (empty by now)
[test.la_container] added test for correct amax results
[la.container.eigen] fixed amax() method to pass test
[stuff.la.eigen] fixed style
[la.container.interfaces] corrected documentation
[test.la_container] added tests
[test.la_container] added struct MatrixTest (empty by now)
[test.la_container] splitted MatrixTest to treat dense and sparse matrices differently
[la.container.interfaces] added two casts to fix warnings
[la.container.istl] fixed clear_col and unit_col methods
[test.la_container] changed MatrixTypes to include associated vector types
[test.la_container] added more matrix tests
[test.la_container] (tried to) fix style