CHANGELOG: Bump to version 0.7.4

CHANGELOG: Bump to v0.7.3

Bumped to v0.7.2 (cycloidio#220)

CHANGELOG: Bump to v0.7.1

CHANGELOG: Bump to 0.7.0

CHANGELOG: Bump to 0.6.4

CHANGELOG: Bumped to version 0.6.3

CHANGELOG: Explain why the empty release (cycloidio#168)

Basically the PP failed and we have to do another release to fix it

Bump version 0.6.1 (cycloidio#166)

CHANGELOG: Prepare for 0.6.0 release (cycloidio#159)