Blender Git Loki

Tests: add utility to generate interactive user actions

A utility that supports passing in actions as command line arguments for
writing reproducible interactions, benchmarking, profiling and testing.

Unlike regular scripts this is able to control model operators usefully.

Typical ways of controlling Blender using this utility are via
operator id's, menu search and explicit events.
Others methods can be added as needed.

See the doc-string for example usage.