function moveToTrash(path, callback) {
        appshell.fs.moveToTrash(path, function (err) {
            callback(_mapError(err));
        });
    }
Move the file or directory at the given path to a system dependent trash
location, calling back asynchronously with a possibly null FileSystemError
string. Directories will be moved even when non-empty.

@param {string} path
@param {function(string)=} callback