Fix path building (#52)

Fix bug with alias path building when we use a custom indexd base URL

indexclient/client.py

@@ -1,8 +1,3 @@
-try:
-    from urlparse import urljoin
-except ImportError:
-    from urllib.parse import urljoin
-
 import copy
 import json
 
@@ -66,7 +61,8 @@ def __init__(self, baseurl, version="v0", auth=None):
         self.version = version
 
     def url_for(self, *path):
-        return urljoin(self.url, "/".join(path))
+        subpath = "/".join(path).lstrip("/")
+        return "{}/{}".format(self.url.rstrip("/"), subpath)
 
     def check_status(self):
         """Check that the API we are trying to communicate with is online"""
@@ -308,7 +304,7 @@ def create_alias(
                 "keeper_authority": keeper_authority,
             }
         )
-        url = "/alias/" + record
+        url = "alias/" + record
         headers = {"content-type": "application/json"}
         resp = self._put(url, headers=headers, data=data, auth=self.auth)
         return resp.json()