Add tests from JSONTestSuite

[Kaiepi]

Fixes #47

[timo]

One of the new lines apparently makes github (and git itself) believe that the test file is binary now; perhaps you can find out which it is and use some escaping to make it plain-old text again?

Also i'd appreciate a comment in the arrays that tells where the tests from this source start, and maybe also a link to the original.

Other than that, good work, thanks!

[Kaiepi]

The tests that were making the file appear to be binary were the ones that used unescaped UTF16 and U+FFFF. I removed those, so now it's back to being a text file.

I'll update the pullreq once Rakudo finishes building and I get a chance to test again
Edit: updated

[timo]

Sorry about the nitpicking, but could you split replacing << >> with « » into a separate commit so that they show up "properly" as different changes in a "git blame"?

[Kaiepi]

Sure

[timo]

fantastic, thanks!