Retox

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* Directory watching only includes .py files now, so log files are ignored
* Fix bug where multiple watch folders would not be watched (bstpierre)

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* Fix small issue in readme not rendering on Pypi

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* Added a dashboard at the top
* Individual task/action feedback for each virtualenv
* Capture crashes within the threadpool into log files
* Added tests and test structure, more ongoing
* Fixed unicode related issue when running in Python 3.x https://github.com/tonybaloney/retox/issues/1

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* Fixed issue where retox command was not starting, with error "TypeError: main() takes exactly 1 argument (0 given)"
See https://github.com/tonybaloney/retox/issues/3

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* Support all tox command line parameters, like -e for environment selection
* Fixed issue where exceptions raised by subprocesses could crash host screen
* Removed dependency on click

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* Fix crash where venv.status would not resolve on a NoneType resource venv