Update README with links to rendered docs, blog and CONTRIBUTING.md (#80)

Closes gh-79

Author: rgommers

README.md

@@ -3,3 +3,11 @@
 This repository contains documents, tooling and other content related to the
 API standard for arrays (or tensors).
 
+These are relevant documents related to the content in this repository:
+
+- [Rendered html docs for latest version](https://data-apis.github.io/array-api/latest)
+- [Consortium announcement blog post](https://data-apis.org/blog/announcing_the_consortium/)
+- [Blog post on first release of draft array API standard](https://data-apis.org/blog/array_api_standard_release/)
+
+See [CONTRIBUTING.md](CONTRIBUTING.md) for how to go about contributing to
+this array API standard.