Made the Maya publisher hook usable with a basic config by allowing the publish template to be optional: if not set, output path are derived from the current Maya workspace.
Fixed a problem preventing the framework to be loaded with Python2 (e.g. in Maya) because we only build PySide2 binaries for Python3 (PySide2 for Python 2 is not pip installable). We now check if Qt is already available before attempting to activate our PySide package, which, generally speaking, seems a sensible thing to do.
If an FBX was generated and published by the Publish FBX item, it is now re-used by the turntable publisher, instead of exporting a new temp FBX. A dependency is made between the FBX publish and the turntable publish.