Added setup.cfg and tests.

Author: stanislavulrych

setup.cfg

@@ -0,0 +1,2 @@
+[metadata]
+description-file = README.md

tempoapiclient/tests/__init__.py

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+from unittest import TestCase
+
+import tempoapiclient
+
+class TestModule(TestCase):
+    def test_client_creation(self):
+        from tempoapiclient import client
+
+        tempo = tempoapiclient.client.Tempo(
+            auth_token="<your_tempo_api_key>",
+            base_url="https://api.tempo.io/core/3")
+
+        self.assertTrue(isinstance(tempo, tempoapiclient.Client.Tempo))