Refactor metric path vs fs transforms
Basic tests for refactored method
Refactor metrics_file usage
Add initial impl of carbon-path
Implement + test reverse metric function
Implement reversal at CLI level
Add prepending functionality to carbon-path
Tidy up a help string
Forgot my DDD
Refactor default storage dir
Fix flake8 complaints
Merge remote branch 'jssjr/master' into path-transforms

Conflicts:
	carbonate/cli.py
Merge pull request #22 from bitprophet/path-transforms

Path transforms