return submission/:id url
Merge pull request #22 from Tonkpils/submission-response

return submission/:id url
Update README to simplify setup instructions
Delete the binary that glitch creates
Extract configuration package
Bump version

This adds the unsubmit command.
Unmarshal error from API to string, not error type
Tell the user where exercises got fetched to.
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Fix config dependencies
Reformat files
Use files map rather than individual files.
Bump version
Support directory trees in assignments

JVM languages require a particular directory structure, so this lets us
create idiomatic scala, clojure, etc exercises.
Bump version
Use new version of codegangsta/cli API
Create exercism directory on login. Fixes #28
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Fix login issue when choosing default directory.

The config file was being written with empty data.

Fixes exercism/exercism.io#998
Bump version