Hi,
i got netgen working (on Ubuntu 15.10) with the following steps:
apt-get install python3.4-dev libfreeimage3 libgl2ps0 libnglib-4.9.13
liboce-foundation8 liboce-modeling8 liboce-ocaf-lite8 liboce-ocaf8
liboce-visualization8 libpython-all-dev libtcl8.5 libtk8.5 libxss-dev
libxt-dev python-
Package: netgen
Version: 4.9.13.dfsg-8+b3
Severity: grave
Justification: renders package unusable
$ netgen
NETGEN-4.9.13
Developed at RWTH Aachen University, Germany
and Johannes Kepler University Linz, Austria
Including OpenCascade geometry kernel
Parsing ng.tcl
optfile ./ng.opt does not exist -