VCPS create NIO work and tested

docs/api/examples/post_vpcsvpcsidportsportidnio.txt

@@ -0,0 +1,22 @@
+curl -i -xPOST 'http://localhost:8000/vpcs/{vpcs_id}/ports/{port_id}/nio' -d '{"local_file": "/tmp/test", "remote_file": "/tmp/remote", "type": "nio_unix"}'
+
+POST /vpcs/{vpcs_id}/ports/{port_id}/nio HTTP/1.1
+{
+    "local_file": "/tmp/test",
+    "remote_file": "/tmp/remote",
+    "type": "nio_unix"
+}
+
+
+HTTP/1.1 404
+CONNECTION: close
+CONTENT-LENGTH: 59
+CONTENT-TYPE: application/json
+DATE: Thu, 08 Jan 2015 16:09:15 GMT
+SERVER: Python/3.4 aiohttp/0.13.1
+X-ROUTE: /vpcs/{vpcs_id}/ports/{port_id}/nio
+
+{
+    "message": "ID 42 doesn't exist",
+    "status": 404
+}