Merge branch 'release/v0.9.0' into develop

* release/v0.9.0:
  Bumped version to 0.9.0
Merge branch 'hotfix/v0.9.1' into develop

* hotfix/v0.9.1:
  Logging with debug in production
  Bumped version to 0.9.1
Merge branch 'hotfix/v0.9.2' into develop

* hotfix/v0.9.2:
  Bumped version to 0.9.2
  derka
Social registration
Bumped version to 0.9.5
Merge branch 'release/v0.9.5'

* release/v0.9.5:
  Bumped version to 0.9.5
  Social registration