Add Geometry File output to Writer Modules

It would be nice to directly output the currently simulated geometry together with the data. Especially in view of !41 (merged) this would be nice, as the misalignment would then be directly accessible to the reconstruction frameworks.

I implemented this for the LCIOWriterModule and the CorryvreckanModule, however, the rotations are once again difficult to get right. @kwolters since you investigated this for some time - could you have a look? Is there a way to get back the three global rotation angles from the Rotation3D matrix we are storing internally?