Objects, arrays and keys are not detected

[jkufner]

Hello,
it would be very nice to highlight object keys in different way than string values.

Example:

{
    "key": "string value"
}

The "key" and "string value" have both the same color.

To implement this it is necessary to detect array and objects correcty -- for now syntax highlight works like simple tokenizer.

This will also allow to highlight missing commas -- see bug #18.

[jkufner]

Ooops... sorry. I reported bug in different repository...