AVRO-1341. Java: Add reflection annotations @AvroName, @AvroIgnore, @AvroMeta, @AvroAlias and @AvroEncode.  Contributed by Vincenz Priesnitz.

git-svn-id: https://svn.apache.org/repos/asf/avro/trunk@1511531 13f79535-47bb-0310-9956-ffa450edef68