Flatten doesnt work when smaller arrays are first.

[ehiggs]

Given the following input:

cat test.json 
{
    "name": "michael",
    "family": [
        {
            "name": "theodore",
            "relation": "father"
        }
    ]
}
{ 
    "name": "john",
    "family": [
        {
            "name": "jane",
            "relation": "sister"
        },
        {
            "name": "janet",
            "relation": "mother"
        }
    ]
}

Yields the following:

json2csv -F test.json
family.0.name,family.0.relation,name
theodore,father,michael
jane,sister,john

[alexwennerberg]

A necessary consequence of streaming parsing. You can use the new samples parameter or specify the fields manually with `--fields``