Add link to release notes

Author: spaced

README.md

@@ -41,8 +41,7 @@ See also example project [scala-js-d3-example-app](https://github.com/spaced/sca
 
 Versions
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+- (Release notes)[https://github.com/spaced/scala-js-d3/releases]
 - scalajs-d3 0.3.3 is for Scala.js 0.6.6+, with both Scala 2.10 and 2.11.
 - scalajs-d3 0.2.0 is for Scala.js 0.6.5, with both Scala 2.10 and 2.11.