src - Bump version from 0.5 to 0.6

git - Merge pull request DinoTools#88 from DinoTools/release_0_5

Release 0.5

git - Merge pull request DinoTools#55 from DinoTools/prepare_release

Prepare release of version 0.4

src - Bump version to 0.3.1

git - Update gitignore

doc - Prepare release

src - Small fixes