test 1d capacitor finished + added utils/timer class for benching

the test performs 24 different simulations based on a Laplace problem
and according to Siegfried's test setup
added capacitor 2d test + 1d/2d test write output files for eval

capacitor 2d test now performs 48 tests according to Siegfried's setup
added pictures of the template devices with geometry and segment infos
removed 'description' from the device templates

obsolete, as we have the much more flexible 'picture' approach,
which in fact supports much easier 3d devices
broken commit: capacitor3d template doesn't compile

currently in the middle of implementation