Merge pull request #117 from segmentio/update-docs

Update History.md for v3 and remove note about submodules in Readme

Author: f2prateek

History.md

@@ -1,3 +1,12 @@
+v3.0.0 / 2016-06-02
+===================
+
+ * 3.0 is a significant rewrite with multiple breaking changes.
+ * [Quickstart](https://segment.com/docs/sources/server/go/quickstart/).
+ * [Documentation](https://segment.com/docs/sources/server/go/).
+ * [GoDocs](https://godoc.org/gopkg.in/segmentio/analytics-go.v3).
+ * [What's New in v3](https://segment.com/docs/sources/server/go/#what-s-new-in-v3).
+
 
 v2.1.0 / 2015-12-28
 ===================

Readme.md

@@ -14,11 +14,6 @@ To install it in the GOPATH:
 go get https://github.com/segmentio/analytics-go
 ```
 
-Or via the Go vendoring mechanism:
-```
-git submodule add https://github.com/segmentio/analytics-go vendor/github.com/segmentio/analytics-go
-```
-
 ## Documentation
 
 The links bellow should provide all the documentation needed to make the best