examples: add rest create order example

bfxapi/examples/ws/cancel_order.py

@@ -10,20 +10,18 @@ API_SECRET=os.getenv("BFX_SECRET")
 bfx = Client(
   API_KEY=API_KEY,
   API_SECRET=API_SECRET,
-  logLevel='INFO'
+  logLevel='DEBUG'
 )
 
 @bfx.ws.on('order_closed')
-def order_cancelled(order, trade):
+def order_cancelled(order):
   print ("Order cancelled.")
   print (order)
-  print (trade)
 
 @bfx.ws.on('order_confirmed')
-async def trade_completed(order, trade):
+async def trade_completed(order):
   print ("Order confirmed.")
   print (order)
-  print (trade)
   await bfx.ws.cancel_order(order.id)
 
 @bfx.ws.on('error')
@@ -32,7 +30,7 @@ def log_error(msg):
 
 @bfx.ws.once('authenticated')
 async def submit_order(auth_message):
-  # create an inital order a really low price so it stays open
+  # create an initial order at a really low price so it stays open
   await bfx.ws.submit_order('tBTCUSD', 10, 1, Order.Type.EXCHANGE_LIMIT)
 
 bfx.ws.run()