Add metadata caching

Change-Id: Ic3fd0d353c66a8ae3732de7f6d342ed159f80b16
diff --git a/.gitignore b/.gitignore
index 8518f50..2aee81a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,5 +22,7 @@
 *.log
 *.db
 *.old
+*.tmp
+*.cache
 .*
 !.gitignore