replace ArrayElement with JSON storage of arrays
combine Array and Scalar results as ConcreteResult
set parent_color on Execution and Result
remove outputs from Workflow.as_dict
update get outputs report to directly fetch workflow outputs
add success/failure status to task
set PYTHONUNBUFFERED
remove shell command and petri var/*
set log level based on environment
dag shouldn't use output connector start place as success place
add some logging for status & inputs
bugfix: capitalization typo
Merge pull request #32 from mark-burnett/cleanup-results

Groundwork for Result cleanup