PSDEZONE-2091: Implements parameter-bag for contentbuilder, variables in YAML-files are resolved in pre-processing.
PSDEZONE-2091: Uses unified YAML-parsing for Include-function handler. This enables pre-processing for variables.
PSDEZONE-2091L simple INI-doc.
PSDEZONE-2091: Adds test for parameter-bag feature.
PSDEZONE-2091: Updates README.MD with "Placeholder Variables"-section.
PSDEZONE-2091: Adds PHPDoc for loadParameterBag().
Merge pull request #11 from olivererdmann/psd/psdezone-2091-contenbuilder-config

Psd/psdezone 2091 contenbuilder config