Use ofagent-go as default, still support ofagent-py (and split the images name/tag)

Change-Id: If7f1b7b5daa587fd27241f79682095518f0a7f0f
diff --git a/.gitignore b/.gitignore
index 5983ce0..fdaa812 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,5 @@
 
 # misc files
 .*.swp
+.remote-sync.json
+.DS_Store