Merge pull request #181 from GuillaumeGomez/update

Update crates version to `0.3.4`

Update crates version to 0.3.3

Merge pull request #154 from GuillaumeGomez/update-version

Update crate version to 0.3.2

Merge pull request #148 from Kijewski/pr-v0.3.1

Bump version numbers for release v0.3.1

Merge pull request #107 from Kijewski/pr-v0.2.1

 Bump version numbers to v0.3.0

Merge pull request #80 from Kijewski/pr-stable-book

Don't link latest version of the book