Gitbook first attempt

Added english and spanish translations, first version of the summary and local installation guide.

docs/es/README.md

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+# Documentación Consul
+[![Build Status](https://travis-ci.org/consul/consul.svg?branch=master)](https://travis-ci.org/consul/consul)
+[![Code Climate](https://codeclimate.com/github/consul/consul/badges/gpa.svg)](https://codeclimate.com/github/consul/consul)
+[![Coverage Status](https://coveralls.io/repos/github/consul/consul/badge.svg?branch=master)](https://coveralls.io/github/consul/consul?branch=master)
+[![License: AGPL v3](https://img.shields.io/badge/License-AGPL%20v3-blue.svg)](http://www.gnu.org/licenses/agpl-3.0)
+[![Accessibility conformance](https://img.shields.io/badge/accessibility-WAI:AA-green.svg)](https://www.w3.org/WAI/eval/Overview)
+
+[![Join the chat at https://gitter.im/consul/consul](https://badges.gitter.im/consul/consul.svg)](https://gitter.im/consul/consul?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg?style=flat-square)](https://github.com/consul/consul/issues?q=is%3Aissue+is%3Aopen+label%3APRs-welcome)
+
+# Licencia
+Código publicado bajo licencia AFFERO GPL v3 (ver [LICENSE-AGPLv3.txt](https://github.com/consul/consul/blob/master/LICENSE-AGPLv3.txt)).