Merge branch 'release/0.1.0'
Merge branch 'develop'
Merge branch 'release/0.1.1'
Merge branch 'release/0.1.2'
Merge branch 'release/0.1.3'
Merge branch 'master' into develop
Added a missed foreign key.
Association tests.
Merge branch 'hotfix/0.1.3.1' into develop