Add CLI flag to exit on exception #101
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jncraton
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This adds a flag to exit on exception (#100). I've only tested this with Python 3 in the Jupyter engine. I wasn't able to find a clean way to handle exceptions in general from Jupyter, so I fell back to checking sys.last_value (the last unhandled exception object). This seems to work fine in the light testing that I've done.
I'm definitely open to better ways to do this or any other feedback.