Merge pull request #216 from onflow/fxamacker/add-godoc

Add doc.go

doc.go

@@ -0,0 +1,23 @@
+// Atree - Scalable Arrays and Ordered Maps
+//
+// Copyright 2021 Dapper Labs, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+/*
+Package atree provides scalable arrays and scalable ordered maps. It is
+used by Cadence in the Flow blockchain.
+
+Atree is maintained at https://github.com/onflow/atree
+*/
+package atree