implemented liquidations endpoint (rest)

bfxapi/examples/rest/get_liquidations.py

@@ -0,0 +1,21 @@
+import os
+import sys
+import asyncio
+import time
+sys.path.append('../../../')
+
+from bfxapi import Client, PUB_REST_HOST
+
+bfx = Client(
+  logLevel='INFO',
+  rest_host=PUB_REST_HOST
+)
+
+now = int(round(time.time() * 1000))
+then = now - (1000 * 60 * 60 * 24 * 10) # 10 days ago
+
+async def get_liquidations():
+  liquidations = await bfx.rest.get_liquidations(start=then, end=now)
+  print(liquidations)
+
+asyncio.get_event_loop().run_until_complete(get_liquidations())