* Clean up to support pydoc
* Support -h
* Make it actually work
* Improve docstrings
* Add copyright
Change-Id: I977df71e8213e39e9eebf9cc56b2dd7625959870
* Clarify wording (don't use 'success' and 'failure' instead use 'found'
and 'no regression test')
* If don't pass gerrit review number run on current branch. In
preparation for running via jenkins.
* If no tests were changed, don't run any tests
Change-Id: I5e876e4e5071fc27461d2411fc33db1bf1724405
Tool detects if a gerrit patch contains tests to detect a regression
Usage: ./tools/regression_tester.py gerrit_review_number
Change-Id: I6353d1efda73fe5fc3098f928b6da9a28eb40590