Remove arbitrary-key environment handling
Convert to argparse
Clean up the container in SSH test
Accept all drivers' options together
README fixes
Document the arguments
Ignore files Pylint won't analyze
Update README.md
Revert "Update README.md"

This reverts commit 0c19805a18d3345984318cb96c3b4604acc81963.
Re-parse the command line arguments one the driver is known
Don't parse arguments for services not enabled
Use dots in namespaced arguments
Argument groups for services
Support passing environment as a hash
Rename test to avoid confusion
Support passing URLs as an array to Elasticsearch
Merge branch 'argparse'
Version bump