add blog post to readme

[tinygraphs](http://tinygraphs.com)

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**tinygraphs** is an avatar generator web service. Checkout [tinygraphs.com](http://www.tinygraphs.com/) to try it out.

**tinygraphs** is an avatar generator web service. Checkout [tinygraphs.com](http://www.tinygraphs.com/) to try it.

[![baby-gopher](https://raw.githubusercontent.com/drnic/babygopher-site/gh-pages/images/babygopher-badge.png)](http://www.babygopher.org)

### Contributors

#### Contributors

* [Santiago](https://github.com/santiaago)

* [Remy](https://github.com/rjourde)

* [Carmen](https://plus.google.com/+CarmenRebolledo)

#### Blog post:

[Building tinygraphs an avatar web service in Go](http://www.sanarias.com/blog/415BuildingtinygraphsanavatarwebserviceinGo)

How to use:

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