Minor cleanup to main `opensesame` script
Merge remote-tracking branch 'origin/playground' into playground
Various improvements to support multiprocess runner
- Compile `opensesame` to `opensesame.pyc` in Windows setup
- Give informative error if `opensesame.py` or `opensesame.pyc` cannot be found
- Clean up messy folder changing
- Active copying of `opensesame` to `opensesame.py` in multiprocess runner
- Fix opensesame_folder() for running from source
Avoid unicode comparison in