Install Atoms Houdini plugin on Linux

Download Atoms Houdini from here.
Extract the AtomsHoudini folder from the zip archive.
Copy the AtomsHoudini folder to:
```
 /opt/Toolchefs/
```

Add the following lines to your houdini.env file (if you installed AtomsHoudini in a different folder please replace "/opt/Toolchefs" with the right location):

ATOMS_DATA = /opt/Toolchefs/AtomsHoudini/data
PYTHONPATH = /opt/Toolchefs/AtomsHoudini/scripts
HOUDINI_PATH = /opt/Toolchefs/AtomsHoudini/:&
ATOMS_ROOT = /opt/Toolchefs/AtomsHoudini

If the license server is running on another machine set the environment variable toolchefs_LICENSE or RLM_LICENSE to 5053@servername.
Set the right installation path inside the AtomsHoudini.sh (if it's different from /opt/Toolchefs/).
Copy the AtomsHoudini.sh script inside /etc/profile.d/