- appears that timestamp queries emit a lot of `rows` with length == 0
- `self.once('end')` is added each of these times
- assertion on listener count shows that more than 10 listeners are applied
pg-cursor no longer returns the empty array 'done' signal to the callback
until the cursor recieves a readyForQuery message. This means pg-query-stream
will not emit 'close' or 'end' events until the server is __truly__ ready for
the next query. This fixes some race-conditions where some queries
are triggered off of the `end` event of the query-stream
closes#3
