Sync multibulk

Added synchronous methods for getting bulk replies.
By the way. If this ever works. It's certainly not what we want.
This can only work if ```result``` has al the data already received from the network at this point. (otherwise, the ```todict``` in the next line could never by synchronous.)

The idea of having a streaming API is that we can already start processing the a part of the received dictionary, before all the data has been transmitted over the network.