Merge branch 'hotfix/0.1.0.dev2' to remove testing dependencies.
Merge branch 'release/0.1.0.dev3'
Adds tests which support to mixin in inherited classes.
Changes the frank_repr to get lazy properties.
Bumps to 0.1.0.dev4 with the hotfix of inherited mixin problems.
Merge branch 'hotfix/0.1.0.dev4' into develop