Add a full object-parsing test for Java.

The 'java' target now fully parses json into objects.
There is a 'java_tokenize' target to run the tokenize-only test that used to
be the default java test.
Merge pull request #12 from mreid-moz/java-parse-full-dom

Add a full object-parsing test for Java.
Update rust benchmark to work with rust 0.7
Merge pull request #13 from mreid-moz/rust-0.7

Update rust benchmark to work with rust 0.7