Add a simple gitignore.
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b60a780
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,6 @@
+# Build artifacts
+*.py[cod]
+google_api_python_client.egg-info/
+
+# Test files
+.tox/