HV-769 Adding support for return value nodes to ConstraintViolationAssert$PathExpection
HV-769 Aligning and simplifying ConstraintDescriptorImpl constructors
HV-769 Determining constraint type automatically for XML-configured constraints with both a generic and a cross-parameter validator
HV-714 Adding ParameterScriptAssert
HV-714 Updating reference guide
HV-701 Introducing HibernateConstraintValidatorContext with addMessageParameter

Also removing unused BeanMetaDataManager variable in ValidationContext
HV-701 Making the javadocs for HibernateConstraintValidatorContext more explicit and also added an @experimental tag
HV-701 Updating online docs
HV-701 Adding new API package to docs and OSGi manifest; formatting improvements in docs; fixing some typos