update readme

README.md

@@ -1,3 +1,5 @@
 # errors [![Travis-CI](https://travis-ci.org/pkg/errors.svg)](https://travis-ci.org/pkg/errors) [![GoDoc](https://godoc.org/github.com/pkg/errors?status.png)](http://godoc.org/github.com/pkg/errors)
 
-Hello there! Read the [presentation](https://t.co/GGPr7HJZYR) to see what the big deal is.
+Read the [presentation](https://t.co/GGPr7HJZYR) to see what the big deal is, blog post coming next week.
+
+Licence: MIT