python: extend CPythonInvoker to be able to handle interpreter initialization/deinitialization
python: introduce CAddonPythonInvoker to be used for python scripts run for addons
[win32] update VS project files
[osx/ios/atv2] - sync xcode projects
Merge pull request #3082 from Montellese/generic_python_invoker

python: move more logic from XBPython to CPythonInvoker