Merge branch 'feature-documentation' into develop

...ava/de/unikoblenz/fgbks/base/builder/AbstractBuilder.java

...java/de/unikoblenz/fgbks/base/builder/DefaultBuilder.java

...ain/java/de/unikoblenz/fgbks/base/domain/Description.java

.../src/main/java/de/unikoblenz/fgbks/base/domain/Label.java

...rc/main/java/de/unikoblenz/fgbks/base/domain/Message.java

...i/src/main/java/de/unikoblenz/fgbks/base/domain/Name.java

...ain/java/de/unikoblenz/fgbks/base/domain/StringValue.java

...i/src/main/java/de/unikoblenz/fgbks/base/domain/Text.java

...java/de/unikoblenz/fgbks/base/json/JsonConfiguration.java

...lenz/fgbks/base/json/JsonSimpleValueObjectSerializer.java

...unikoblenz/fgbks/base/json/PrivateVisibilityStrategy.java

...ava/de/unikoblenz/fgbks/base/utils/UniqueIdGenerator.java

...nikoblenz/fgbks/base/utils/boundary/AbstractBoundary.java

...nz/fgbks/base/utils/boundary/AbstractGrowingBoundary.java

...va/de/unikoblenz/fgbks/base/utils/boundary/BoundType.java

...ava/de/unikoblenz/fgbks/base/utils/boundary/Boundary.java

...tils/boundary/BoundaryOperationNotSupportedException.java

...enz/fgbks/base/utils/boundary/BoundaryParseException.java

.../fgbks/base/utils/boundary/bicreater/BiCreaterAppend.java

...fgbks/base/utils/boundary/bicreater/BiCreaterBetween.java