Add makefile option for NDEBUG.
Merge https://github.com/mattmilten/appfs
Purge warning.
Merge https://github.com/mattmilten/appfs
Merge pull request #43 from AndreG-P/master

Adds exercise 6 plus the solution.
Merge https://github.com/mattmilten/appfs
Update README.md
Initial gitignore. Ignores coverage data.
Merge https://github.com/mattmilten/appfs
Update README.md
Advanced gitignore.
Merge pull request #46 from wuschel91/master

Add gitignore stuff mentioned in issue #44
Update makefile