Add a check for submitting tests
Refactor env
Merge pull request #38 from androbtech/remove_duplication_env

Refactor env
Merge pull request #36 from androbtech/add_a_check_for_submitting_tests

Add a check for submitting tests (issue #35)
Refactor config paths

Don't write Exercism.home, just pass the desired value to the login
method.
Refactor assignment
Refactor Env
Ensure submission tests work
Refactor submission
Inline helpers into command.

Don't spread state across the CLI file.
Provide more context on fetch. Fixes #17.
Bump version