Version 0.16.0.
Major changes:
* Now uses PySide2 for user interface widgets
* Now uses PyInstaller to create operating system installers
* Now opens **map-client-workflow.proj** file for workflow and not directory
* Added workflow upgrade tool
* Added **list-of-** predicate
Minor changes:
* Loads previous workflow on start
* Workflow view area zoom behaviour changed
* Splash screen added
* Plugin wizard produces more PEP8 compliant skeleton plugins
[odd release with mapping tools]
[odd release with installer]