IP tessellated MeshSeries

Mainly addind the option to "ip tessellate" a entire MeshSeries instead of a single Mesh. Therefore i crudely introduced "synthetic" types of MeshSeries.

Also unified the probe function for both PVD and XDMF types. This got rid of the VTUIO dependency, but I'm not sure, how to update the requirements.txt... just running make requirement doesn't do it for me.

Further fixes #68 (closed)