Added vcversioner.py script to MANIFEST.in
(required for conda build)

Change-Id: I558fad65534ac7393b32b6bac3b381e80c8307bd
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/95
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>