Add /block_results?height=H as rpc endpoint

Expose it in rpc client
Move ABCIResults into tendermint/types from tendermint/state

rpc/client/localclient.go

@@ -100,6 +100,10 @@ func (Local) Block(height *int64) (*ctypes.ResultBlock, error) {
 	return core.Block(height)
 }
 
+func (Local) BlockResults(height *int64) (*ctypes.ResultBlockResults, error) {
+	return core.BlockResults(height)
+}
+
 func (Local) Commit(height *int64) (*ctypes.ResultCommit, error) {
 	return core.Commit(height)
 }