Abusing monadic 'do' notation library for generating JSON object. Hard-bound to JSValue from json package from hackage.

Main ideas

• Overloaded function value to set values in underlying JSON - Bool, Int, String, lists, etc.
• JSON generation may not be pure with valueM. You can perform some IO while generating JSON. This is usefull skip useless inner binding.
• Compositionality - use object to easy create JSON objects. The objects function is there to support arrays of objects.
• Monadic notation - it really looks nicer then composition with . or some magic combinator

runJSONGen $ do
    value "a" "a"
    value "b" [1,2,3]
    object "c" $ do
        value "x" True
        value "y" False

Will generate json object:

{a : "a", b: [1,2,3], c: {x: true, y : false}}