run js tests without explicit directory change (let make do all the work)
Merge pull request #1126 from wilmoore/run-js-test-without-cd

run js tests without explicit directory change (let make do all the work).
fix find warning and use tr instead of basename
Merge pull request #1129 from wilmoore/attempt-to-fix-ci-warnings

fix find warnings and use tr instead of basename
Detect exercise regardless of case. Fixes #1127.
Only downcase slug if it is present.

Some of the older command line clients don't send the path info along,
only the file.
Add hints for Elixir's zipper exercise

It turns out the exercise is a bit hard, these hints should help people.
Merge pull request #1130 from pminten/hints-for-elixir-zipper

Add hints for Elixir's zipper exercise
Tweak test data