split and reorg

...sControl/src/ca/nrc/cadc/ac/xml/AbstractReaderWriter.java

...AccessControl/src/ca/nrc/cadc/ac/xml/GroupListReader.java

...AccessControl/src/ca/nrc/cadc/ac/xml/GroupListWriter.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/GroupReader.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/GroupWriter.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/UserListReader.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/UserListWriter.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/UserReader.java

...cessControl/src/ca/nrc/cadc/ac/xml/UserRequestReader.java

...cessControl/src/ca/nrc/cadc/ac/xml/UserRequestWriter.java

cadcAccessControl/src/ca/nrc/cadc/ac/xml/UserWriter.java

...essControl/test/src/ca/nrc/cadc/ac/GroupPropertyTest.java

cadcAccessControl/test/src/ca/nrc/cadc/ac/GroupTest.java

...sControl/test/src/ca/nrc/cadc/ac/PersonalDetailsTest.java

...cessControl/test/src/ca/nrc/cadc/ac/PosixDetailsTest.java

cadcAccessControl/test/src/ca/nrc/cadc/ac/RoleTest.java

...ccessControl/test/src/ca/nrc/cadc/ac/UserRequestTest.java

cadcAccessControl/test/src/ca/nrc/cadc/ac/UserTest.java

...Control/test/src/ca/nrc/cadc/ac/client/GMSClientTest.java

...rc/cadc/ac/client/JsonUserListInputStreamWrapperTest.java