doc code comments for feed_cb.go
doc code comments for feed_cb.go

couchbaselabs/cbft,couchbaselabs/cbgt,nimishzynga/cbgt,couchbaselabs/cbft,nimishzynga/cbgt,nimishzynga/cbgt,nimishzynga/cbgt,couchbaselabs/cbft,couchbaselabs/cbgt,couchbaselabs/cbft,couchbaselabs/cbgt,couchbaselabs/cbgt