Add Java JSON protocol implementation.

Implement full-featured JSON protocol, low-level base-64 encode/decode
methods, and related tests.

Conflicts (resolved by dreiss):

	test/java/build.xml


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665562 13f79535-47bb-0310-9956-ffa450edef68
4 files changed