Consider using JSON.parse instead of eval

[neatonk]

From freesound.js#L84-87...

if (xhr.readyState === 4 && [200,201,202].indexOf(xhr.status)>=0){
    var data = eval("(" + xhr.responseText + ")");
    if(success) success(wrapper?wrapper(data):data);
}

I believe xhr.responseText is a JSON string, in which case JSON.parse can be used to safely parse the data. Is there a reason eval is used instead?