Fixes "acquire" method to calculate BTC from adjusted amount so that the fee is incorporated in to the calculation allowing the entire usd balance to be used to buy BTC.
Moved adjusted_usd_amount to common since it was not technically a client interaction function.
Created decisions package.
Added "absolute zero" decision to package and imported it in to ooda.
Moves "minimum_profit" and "minimize_loss" decisions in to their own modules thereby simplifying the implementation of the OODA cycle.