Fix path prefix for OSX
Merge remote-tracking branch 'chiiph/bug/path_prefix' into develop
Check if schema exists before load a config.

Related to #3310.
Merge remote-tracking branch 'ivan/feature/check-if-schema-exists' into develop
Handle schemas and api versions in base class.
Merge remote-tracking branch 'ivan/feature/common-code-to-base-config' into develop
Fix old parameter error.
Merge remote-tracking branch 'ivan/bug/fix-old-parameter-error' into develop
Fold in changes
Bump version to 0.3.0
Merge branch 'release-0.3.0'