It was outputting the type instead of the field name, and didn't deal
with NULL fields. Added test case.
Also fixed token enums having the wrong value, resulting in
unreadable error messages.
Change-Id: Icd9b4d22f417bfad5824c0f58e067ce3f2e2dc6f
Tested: on Windows and Linux.
This will add quotes around field names, as required by the official
standard. By default it will leave quotes out, as it is more readable,
more compact, and is accepted by almost all JSON parsers.
The -S switch to flatc turns on strict mode.
As per rfc 7159.
Change-Id: Ibabe9c8162c47339d00ec581d18721a2ba40c6d0
Tested: on Windows.