message: Document behavior of pending operations on close
diff: @@ -131,6 +131,18 @@ The following options are for advanced performance tuning. Modify them only if y
  <code>close()</code> is an instance method on an existing database object. The underlying LevelDB database will be closed and the `callback` function will be called with no arguments if the operation is successful or with a single `error` argument if the operation failed for any reason.
  +`leveldown` waits for any pending operations to finish before closing. For example:
  +
  +```js
  +db.put('key', 'value', function (err) {
  + // This happens first
  +})
  +
  +db.close(function (err) {
  + // This happens second
  +})
  +```
  +
  <a name="leveldown_put"></a>
  ### `db.put(key, value[, options], callback)`
  