Philipp Klaus authored Apr 20, 2020 and Florian Uhlig committed Apr 23, 2020

Variants:

* v20a: stations at old location but all changes reported below in
* v20b: as v20a, but TPG carrier thickness increased to
  500 µm, all stations moved upstream by 4cm.
* v20c: as v20a but moved upstream by 4cm.

Detailed changes in those new geometries are:

* Position of the MVD moved 4cm upstream (v20b & v20c),
* TPG carriers' thickness updated (from 300 µm in v17 to 380 µm [500 µm]),
* MVD specifc custom materials defined in media.geo (TPG, diamond, glue, fpc),
* CVD diamond only used for first station on VX version,
* transformation matrix added to the ROOT output file
  placing the detector in the CBM coordinate system,
* addition of a top and bottom mounting plate of 10mm aluminium,
* vertical aluminium heatsinks' thickness increased by 3mm to mock
  the expected material from FEBs that will be mounted on top of them.