OrderBook, OrderBookEvent

[femtotrader]

Closes #159

[coveralls]

Coverage increased (+1.5%) to 65.413% when pulling 57a0824 on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+1.6%) to 65.542% when pulling 36ff82a on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+1.5%) to 65.413% when pulling 1da526d on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+1.5%) to 65.413% when pulling 1da526d on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+1.6%) to 65.581% when pulling 1da526d on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+1.8%) to 65.751% when pulling d6b7f68 on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[mhallsmoore]

Hey @femtotrader, this is great!

I haven't had much time to look at it so far, but will take a look ASAP and try get it merged.

Mike.

[coveralls]

Coverage increased (+2.4%) to 66.394% when pulling 2bdbcc2 on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+2.4%) to 66.394% when pulling 2bdbcc2 on femtotrader:orderbook into e0a9234 on mhallsmoore:master.

[coveralls]

Coverage increased (+2.4%) to 66.394% when pulling 3421943 on femtotrader:orderbook into e0a9234 on mhallsmoore:master.