add depth and trades api call tests for bitcurex
add depth and trades api call tests for bitfinex
add depth and trades api call tests for bitstamp
add depth and trades api call tests for btcchina
add depth and trades api call tests for btce
add depth and trades api call tests for campbx
add depth and trades api call tests for cryptotrade
add depth and trades api call tests for cryptsy
add depth and trades api call tests for intersango
add depth and trades api call tests for justcoin
add depth and trades api call tests for localbitcoins
add depth and trades api call tests for mtgox
add depth and trades api call tests for rocktrading