CAY-1916 cayenne-crypto module that enables data encryption for certain model attributes

moving valueTransformer-related stuff into own package

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1582974 13f79535-47bb-0310-9956-ffa450edef68
CAY-1916 cayenne-crypto module that enables data encryption for certain model attributes

* valueTranformerFactory to use DbAttribute (instead of int type) to compile transformers
* JceTransformerFactory - in progress

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1582975 13f79535-47bb-0310-9956-ffa450edef68
CAY-1916 cayenne-crypto module that enables data encryption for certain model attributes

* JceTransformerFactory - in progress + tests

git-svn-id: https://svn.apache.org/repos/asf/cayenne/main/trunk@1582976 13f79535-47bb-0310-9956-ffa450edef68