Added pretty print JSON to Boon

    puts(Maps.asPrettyJsonString(map));
    puts(Boon.toPrettyJson(map));

Boon.toPrettyJson works with Set, Map, instances, etc.

(

https://github.com/RichardHightower/boon/issues/170

)

Maps.asPrettyJsonString
BeanUtils.asPrettyJsonString (can pass custom mapper)
Lists.asPrettyJsonString 
Sets.asPrettyJsonString

Most people will want to use Boon.toPrettyJson

I am sure there are bugs, but it works mostly now. More testing needed of course.

{
    "name" : "Rick",
    "age" : 45,
    "wife" :         {
            "name" : "Diana"
        },
    "children" : [        {
            "name" : "Whitney"
        },        {
            "name" : "Maya"
        },        {
            "name" : "Lucas"
        },        {
            "name" : "Ryan"
        },        {
            "name" : "Noah"
        }],
    "fruit" : ["apple","orange","strawberry"]
}