Buildcat 0.5.0

• Added certificate-info command to show certificate file details.
• Added workers command to start more than one worker at a time.
• Updated houdini-render-ifd command can submit multiple jobs at once.
• Set a reasonable default timeout for the houdini-render-ifd command.
• Added timeout arguments for houdini-render-hip, modo-render, and redshift-render commands.
• Allow newer Redis versions.
• Switched to pyproject.toml and flit for packaging.