Fix import path for atomic test dependency

Fixes #18

Adds a change log.

CHANGELOG.md

@@ -0,0 +1,17 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## Unreleased
+### Fixed
+- Changed the import path for `go.uber.org/atomic` to its newer, canonical
+  import path.
+  [#18](https://github.com/uber-go/ratelimit/issues/18)
+
+## [1.0.0] - 2016-09-09
+- Initial release
+
+[Unreleased]: https://github.com/uber-go/fx/compare/v1.0.0...master
+[1.0.0]: https://github.com/uber-go/fx/tree/v1.0.0

glide.yaml

@@ -4,4 +4,4 @@ testImport:
 - package: github.com/stretchr/testify
   subpackages:
   - assert
-- package: github.com/uber-go/atomic
+- package: go.uber.org/atomic

ratelimit_test.go

@@ -6,11 +6,11 @@ import (
 	"testing"
 	"time"
 
+	"go.uber.org/atomic"
 	"go.uber.org/ratelimit"
 	"go.uber.org/ratelimit/internal/clock"
 
 	"github.com/stretchr/testify/assert"
-	"github.com/uber-go/atomic"
 )
 
 func ExampleRatelimit() {