Most noteable is the addition of the line on which the error occurs for script tasks. It will report the line number and pass back the content of
the line that failed.
The validator only returns the first error it encounters, as it's clear that all we ever get right now is two of the same error.
Did a lot of work between this and spiffworkflow to remove all the places where we obfuscate or drop details as we converted between workflowExceptions and APIExceptions.
Dropped the python levenshtein dependency, in favor of just rolling a simple one ourselves in Spiffworkflow.