Adding pull and pull_all tasks
Version bump
Fix typo in pull task
Version bump
Making it possible to have optional env vars
Hide environment variables from logging
Version bump
Split the correct variable when interpreting volumes

Fixes #4
rainbow_logging_handler 2.2.1 is broken
5 second timeout to docker seems a bit too low
Version bump
Upgrading some depedencies
Version bump
Adding a tests for _errors functionality on HarpoonError
Initial work to seperate out normalising yaml from using options
Starting to write tests for option_spec.spec_base
Writing more spec_base tests
String_spec tests
Combining dictof and dictionary_spec
Tests for create_spec