GeoJson-flip

I had to make this little util out of necessity. It only flips 2d geojson.

Geojson-spec
says that The order of elements must follow x, y, z order (easting, northing,
altitude for coordinates in a projected coordinate reference system, or longitude, latitude,
altitude for coordinates in a geographic coordinate reference system).
Map websites like geojson.io and github gist (*.geojson) uses this order of
coordinates. MongoDB also uses lon lat.

But applications differ as this web page show and should you
encounter an issue with coordinates on the wrong, then flip em.

Usage

`javascript
var flip = require("geojson-flip").flip;

console.log(
flip({
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [125.6, 10.1]
},
"properties": {}
}
]
}))

/**
{
"type": "FeatureCollection",
"features": [
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [10.1, 125.6]
},
"properties": {}
}
]
}

**/

``