Add more .gitignore entries.
diff --git a/.gitignore b/.gitignore
index b60a780..ddb969d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,8 @@
 # Build artifacts
 *.py[cod]
 google_api_python_client.egg-info/
+build/
+dist/
 
 # Test files
 .tox/