v0.7.1: February cleanup

Changes since v0.7.0:

- Add a short section about TDD
- Add note about single assertions per test
- Add a reference to node-quickcheck in JS
- Add a section about code checking

v0.7.0: Add information about Codewars platform and preloaded section

This release brings new information about the Codewars platform and the preloaded section. It also restructures the overall document, making it easier to navigate both in the PDF as well as in the online version.

v0.6.4: Extend the section about proper types

Fixes #24.

v0.6.3

Add section about floating points to Python

v0.6.2

Add newlines at end of files

v0.6.1

Add a word of warning

v0.6.0

Add a section on translations

v0.5.1: Merge pull request #21 from bkaestner/issue-20-solutions

Add information on how to handle reference solutions

v0.5.0

Set code snippets under Unilicense

v0.4.5: Add a section on fixing tests

Fixes #19.