Update namespaces in json_test
Update to Java commit f0dd129 (2012.03.07) Fix error writing strings containing chars outside the BMP
Update to Java commit f987068 (2012.10.12): Use 'case' with integers instead of 'cond'
Update to Java commit f30e303 (2012.10.12): Do not gather up true/false/null in vectors
Update to Java commit 5e898f2 (2012.10.12): Eliminate protocol, don't use Clojure reader for numbers
Update to Java commit 4fb49fa (2012.10.12): Modify test to read directly from string