module.exports = {
    Tile: require('./tile'),
    Map: require('./map'),
    TileBatch: require('./batch'),
    MBTiles: require('./mbtiles'),
    SphericalMercator: require('./sphericalmercator')
};

module.exports = {
    Tile: require('./tile'),
    Map: require('./map'),
    TileBatch: require('./batch'),
    MBTiles: require('./mbtiles'),
    SphericalMercator: require('./sphericalmercator'),
    Pool: require('./mappool')
};

Add Pool to exported classes.
Add Pool to exported classes.
