uurequests: Improve compatibility with CPython

"method", "path" and "host" are all variables of regular string type,
which doesn't interpolate well into bytestrings.

This change will resolve pfalcon#49.

Author: amotl

uurequests/uurequests.py

@@ -64,9 +64,9 @@ def request(method, url, data=None, json=None, headers={}, stream=None, parse_he
             s.connect(ai[-1])
             if proto == "https:":
                 s = ussl.wrap_socket(s, server_hostname=host)
-            s.write(b"%s /%s HTTP/1.0\r\n" % (method, path))
+            s.write(b"%s /%s HTTP/1.0\r\n" % (method.encode(), path.encode()))
             if not "Host" in headers:
-                s.write(b"Host: %s\r\n" % host)
+                s.write(b"Host: %s\r\n" % host.encode())
             # Iterate over keys to avoid tuple alloc
             for k in headers:
                 s.write(k)