old_contents: 
  from cryptotik.poloniex import Poloniex
  from cryptotik.bittrex import Bittrex
  from cryptotik.wex import Wex
  from cryptotik.therock import TheRock
  from cryptotik.livecoin import Livecoin
  from cryptotik.okcoin import OKcoin
  from cryptotik.hitbtc import Hitbtc
  from cryptotik.bitstamp import Bitstamp
  from cryptotik.binance import Binance
  from cryptotik.bitkonan import Bitkonan
  from cryptotik.kraken import Kraken
  from cryptotik.cryptopia import Cryptopia
  
new_contents: 
  from cryptotik.poloniex import Poloniex
  from cryptotik.bittrex import Bittrex
  from cryptotik.wex import Wex
  from cryptotik.therock import TheRock
  from cryptotik.hitbtc import Hitbtc
  from cryptotik.bitstamp import Bitstamp
  from cryptotik.binance import Binance
  from cryptotik.bitkonan import Bitkonan
  from cryptotik.kraken import Kraken
  from cryptotik.cryptopia import Cryptopia
  
subject: remove OKcoin from init as they are not implemented properly yet