WIP - Untested VersionChooser Concept
snake -> CamelCase
Just clone or checkout from ~/.psychopy/versions
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Merge pull request #597 from kastman/ENH_VersionChooser

WIP - Untested VersionChooser Concept
Merge pull request #600 from jeremygray/master

TEST tweaks and BF for rating scale component
TEST: test info.py