Fix typos in PART2 text
Update unpacker.rb
Simplify part 1 by providing appropriate tests and test runner
Merge branch 'master' of github.com:elm-city-craftworks/course-001
Update ls_tests.rb
Add a test case covering unicode multibyte data
Update CHANGELOG.md
Update README.md
Add sample files for Part 3
Merge branch 'master' of github.com:elm-city-craftworks/course-001
Update samples README for part 3
Add part 3 exercises
Add a link to code samples
Update PART_3.md
Update README.md
Update PART_3.md
Number questions from part 1
Merge branch 'master' of github.com:elm-city-craftworks/course-001
Add questions to Part 3
Tweak wording