Examples timing improvement

[robinsonkwame]

The timing (e.g. https://github.com/robinsonkwame/wabbit_wappa/blob/master/examples/capitalization_demo.py#L111-L117) in the example files could be improved (maybe by even an order of magnitude) by consolidating multiple examples and transmitting as one packet; here the examples are separated by a newline and vw returns an answer for each example with only one socket send/recv call.