Removed orderList from the TradeAPI class, as the method is no longer supported on the exchange server.
Updated sample code to use activeOrders instead of orderList.
Display "no orders" if there are no open orders in the print-account-info sample.
Fixes #27.
Updated documentation to match current code.
Fixes #23.
Clarified getTradeFee docstring.
Removed outdated secret and nonce parameters from TradeAPI.__init__.
Fixed reference to deprecated orderList method in OrderItem docstring.
Merge branch 'master' into py3

Conflicts:
	btceapi/trade.py
	samples/cancel-orders.py
	samples/print-account-info.py
	samples/print-trans-history.py