SPR-8082
SPR-7833
+ add support for CacheDefinitions declarations inside XML
+ more integration tests

+ introduced @CacheDefinition annotation
+ introduced meta-annotation to allow multiple @cache annotations
SPR-7833
SPR-8082

+ refactor a bit the internals of CacheAspect to allow invocations that do not throw any exceptions (AspectJ)

SPR-7832
+ expose the invocation params through the cache root object
+ update javadocs

+ update default key generator strategy to improve compatibility for implicit declaration on one arg method
+ updated docs

+ fix initialization problem for root object (inside SpEL eval context)
+ add integration tests for root object expressions

SPR-7736
+ clarify storage of null values

+ add support for multiple cache names
+ require each annotation to specify a cache name
+ add method support in Key generator interface
+ add bug fix for embedded JDK concurrent declaration

+ initial commit of caching abstraction
+ main API
+ Spring AOP and AspectJ support
+ annotation driven, declarative support
+ initial namespace draft