Begin adding proof calls

example/dummy/dummy.go

@@ -53,6 +53,10 @@ func (app *DummyApplication) Query(query []byte) types.Result {
 	return types.NewResultOK(wire.JSONBytes(queryResult), "")
 }
 
+func (app *DummyApplication) Proof(key []byte) types.Result {
+	return types.NewResultOK(nil, Fmt("TODO: support proof!"))
+}
+
 type QueryResult struct {
 	Index    int    `json:"index"`
 	Value    string `json:"value"`

example/dummy/persistent_dummy.go

@@ -93,6 +93,10 @@ func (app *PersistentDummyApplication) Query(query []byte) types.Result {
 	return app.app.Query(query)
 }
 
+func (app *PersistentDummyApplication) Proof(key []byte) types.Result {
+	return types.NewResultOK(nil, Fmt("TODO: support proof!"))
+}
+
 // Save the validators in the merkle tree
 func (app *PersistentDummyApplication) InitChain(validators []*types.Validator) {
 	for _, v := range validators {