Support expand query parameter for match retrieval

Change-Id: I9cf360441207ad86dcd76de1020368e409fe3d0d
diff --git a/.gitignore b/.gitignore
index 4e95513..95d91a7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,7 +8,7 @@
 *.iml
 dependency-reduced-pom.xml
 admin_token
-/sandbox/
+/sandbox
 /bin/
 /db.sqlite
 /lite/liteDB.sqlite