Houdini integration broken

[mruegenberg]

Context
Hello,
I've been looking at the Houdini integration and found that in houdini.py currently a bunch of methods (e.g the software name) are missing while others look like they might be superfluous/old. Others (eg for grabbing renders) have different arguments for eg the colour space stuff.

Happy to help out with testing and some development.

[frankrousseau]

Yes, we didn't work on the Houdini integration for a while. It needs some cleanup.