Binary packages to install OMSens

[GianniFerretti]

We manually solve all the problems as described in issue #17 in OpenModelica/OMSens repository.
It is suggested to incorporate the solution into nigtly build packages.
We propose to make a binary package to install OMSens, our manually solution was:

• git clone https://github.com/OpenModelica/OMSens.git
• Copy OpenModelica/OMsens in /usr/share
• Move to /usr/share/OMSens
• Run python3 setup.py install

@casella

[adrpo]

We need to do a proper pip package out of OMSens as currentluy is a bad mess of arbitrary Python scripts and Fortran files.
I wanted to package it as a Debian package but @sjoelund doesn't like the idea. I might just go ahead and do it as we don't have time to fix OMSens packaging yet.