docs: updating readme (#639)

This is making the readme consistent with some of the other SIG repos:
- [js](https://github.com/open-telemetry/opentelemetry-js/blob/master/README.md)
- [collector](https://github.com/open-telemetry/opentelemetry-collector)

Co-authored-by: Mauricio Vásquez <mauricio@kinvolk.io>
Co-authored-by: Yusuke Tsutsumi <yusuke@tsutsumi.io>

README.md

@@ -1,6 +1,42 @@
-# OpenTelemetry Python
-[![Gitter chat](https://img.shields.io/gitter/room/opentelemetry/opentelemetry-python)](https://gitter.im/open-telemetry/opentelemetry-python)
-[![Build status](https://travis-ci.org/open-telemetry/opentelemetry-python.svg?branch=master)](https://travis-ci.org/open-telemetry/opentelemetry-python)
+---
+<p align="center">
+  <strong>
+    <a href="https://opentelemetry-python.readthedocs.io/en/stable/getting-started.html">Getting Started<a/>
+    &nbsp;&nbsp;&bull;&nbsp;&nbsp;
+    <a href="https://opentelemetry-python.readthedocs.io/">API Documentation<a/>
+    &nbsp;&nbsp;&bull;&nbsp;&nbsp;
+    <a href="https://gitter.im/open-telemetry/opentelemetry-python">Getting In Touch (Gitter)<a/>
+  </strong>
+</p>
+
+<p align="center">
+  <a href="https://github.com/open-telemetry/opentelemetry-python/releases">
+    <img alt="GitHub release (latest by date including pre-releases)" src="https://img.shields.io/github/v/release/open-telemetry/opentelemetry-python?include_prereleases&style=for-the-badge">
+  </a>
+  <a href="https://codecov.io/gh/open-telemetry/opentelemetry-python/branch/master/">
+    <img alt="Codecov Status" src="https://img.shields.io/codecov/c/github/open-telemetry/opentelemetry-python?style=for-the-badge">
+  </a>
+  <a href="https://github.com/open-telemetry/opentelemetry-python/blob/master/LICENSE">
+    <img alt="license" src="https://img.shields.io/badge/license-Apache_2.0-green.svg?style=for-the-badge">
+  </a>
+  <br/>
+  <a href="https://travis-ci.org/open-telemetry/opentelemetry-python">
+    <img alt="Build Status" src="https://travis-ci.org/open-telemetry/opentelemetry-python.svg?branch=master">
+  </a>
+  <img alt="Beta" src="https://img.shields.io/badge/status-beta-informational?logo=data:image/png;base64,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">
+</p>
+
+<p align="center">
+  <strong>
+    <a href="CONTRIBUTING.md">Contributing<a/>
+    &nbsp;&nbsp;&bull;&nbsp;&nbsp;
+    <a href="https://opentelemetry-python.readthedocs.io/en/stable/#examples">Examples<a/>
+  </strong>
+</p>
+
+---
+
+## About this project
 
 The Python [OpenTelemetry](https://opentelemetry.io/) client.