Update readme (#448)

Changes to README

part of #393 

[skip ci]

README.md

@@ -1,8 +1,8 @@
-# Popper
-
-[![Build Status](https://travis-ci.org/systemslab/popper.svg?branch=master)](https://travis-ci.org/systemslab/popper) [![Join the chat at https://gitter.im/systemslab/popper](https://badges.gitter.im/systemslab/popper.svg)](https://gitter.im/falsifiable-us/popper?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)  [![PyPI version](https://badge.fury.io/py/popper.svg)](https://badge.fury.io/py/popper) [![GitHub license](https://img.shields.io/github/license/systemslab/popper.svg)](https://github.com/systemslab/popper/blob/master/LICENSE)
-[![Popper Status](http://badges.falsifiable.us/systemslab/popper)](http://popper.rtfd.io/en/latest/sections/badge_server.html)
+# Popper [![Build Status](https://travis-ci.org/systemslab/popper.svg?branch=master)](https://travis-ci.org/systemslab/popper) [![Join the chat at https://gitter.im/systemslab/popper](https://badges.gitter.im/systemslab/popper.svg)](https://gitter.im/falsifiable-us/popper?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge) [![PyPI version](https://badge.fury.io/py/popper.svg)](https://badge.fury.io/py/popper) [![GitHub license](https://img.shields.io/github/license/systemslab/popper.svg)](https://github.com/systemslab/popper/blob/master/LICENSE) [![Popper Status](http://badges.falsifiable.us/systemslab/popper)](http://popper.rtfd.io/en/latest/sections/badge_server.html)
 
+<p align="center" style="text-align:center;">
+  <img src="https://github.com/systemslab/popper/raw/master/docs/figures/popper_logo.png" width="200" />
+</p>
 
 Popper is a convention and CLI tool for generating reproducible papers. This repository contains:
 
@@ -12,14 +12,15 @@ Popper is a convention and CLI tool for generating reproducible papers. This rep
     convention and the CLI tool.
   * Contents of our [landing page](http://falsifiable.us) ([`gh-pages`](https://github.com/systemslab/popper/tree/gh-pages) branch).
 
-Quick links to other resources:
 
+Quick links to other resources:
   * [5-minute screencast demo of the CLI](https://asciinema.org/a/xzEYfI3U4H5CWdmjBe0O2CAw8).
   * [Slidedeck introducing the convention](https://www.slideshare.net/ivotron/the-popper-experimentation-protocol-and-cli-tool-86987253).
   * [10-min video recording of intro and demo](https://air.mozilla.org/mozilla-open-leaders-round-4-final-demos-open-succulent-project/#@52m0s).
   * [Software Carpentry formatted Lesson](https://popperized.github.io/swc-lesson/).
   * [List of repositories that follow the convention](https://github.com/popperized).
 
+
 ## Installation
 
 See [here](cli/) for instructions on how to install the CLI tool. Once
@@ -32,6 +33,7 @@ popper --help
 
 For a quickstart guide on how to use the CLI, look [here](http://popper.readthedocs.io/en/latest/protocol/getting_started.html#quickstart-guide).
 
+
 ## Contributing
 
 Anyone is welcome to contribute to Popper! To get started, take a look