#4 JSAPI 17 support

[Sean Lynch]

I'm running into a few problems trying to use current git as of 2013-05-22 with jsapi 17:

1. uintN is gone, it's now just unsigned (resolved with a typedef in the ,j)
2. JS_NewNumberValue is gone, replaced by JS_NumberValue (resolved by defining a stub function)
3. There is a weird call to cstring() in the generated output. Probably nothing to do with the JSAPI version.

If you don't have time to get around to this before I do I'll work on it and send a patch.