- Renamed classes:
	- (Base|Closeable)AttributeProviderModule >
(Base|Closeable)DesignatedAttributeProvider
	- (Base)RequestFilter -> (Base)DecisionRequestPreprocessor
	- DecisionResultFilter -> DecisionResultPostprocessor
	- CloseablePdp -> CloseablePdpEngine
	- (Immutable)PdpDecisionRequest -> (Immutable)DecisionRequest
	- PdpDecisionResult -> DecisionResult
	- PdpDecisionRequest(Factory|Builder) ->
DecisionRequest(Factory|Builder)
	- (Base|Closeable)(Static)RefPolicyProviderModule ->
(Base|Closeable)(Static)RefPolicyProvider
	- RootPolicyProviderModule -> RootPolicyProvider
	- (Base)DatatypeFactory(Registry) ->
(Base)AttributeValueFactory(Registry) (using new class AttributeDatatype
subclass of Datatype)
- Uses of JAXBElement<IdReferenceType> (for Policy(Set)IdReference)
replaced by PrimaryPolicyMetadata (identifies Policy uniquely)
- Moved JaxbXacmlUtils utility class to authzforce-ce-xacml-model
project (renamed Xacml3JaxbHelper)
- New extensible framework for PDP engine adapters, e.g. for specific
types of input/output (SerDes), PDP engine itself made agnostic of
request/response serialization formats 
	- New package org.ow2.authzforce.core.pdp.api.io for classes related to
input/output (SerDes) adapter, e.g. from/to XACML-XML
	- New interface PdpEngineInoutAdapter (default implementation is
XACML/XML using JAXB API, XACML/JSON one moved to separate project)
	- AtomicValue -> PrimitiveValue
	- More optimal implementation of XACML integer values: 3 possible
GenericInteger interface implementations depending on maximum (size)
(ArbitrarilyBigInteger for java BigIntegers, MediumInteger for java
Integers, and LongInteger for java Longs), with value caching (like Java
Integer/Long)