Add README.md.

README.md

@@ -0,0 +1,31 @@
+# Repeated Improvement Analysis
+[![GPLv3](https://img.shields.io/badge/license-GPLv3-blue.svg)](https://www.gnu.org/copyleft/gpl.html)
+[![Build Status](https://travis-ci.org/rgmining/ria.svg?branch=master)](https://travis-ci.org/rgmining/ria)
+[![wercker status](https://app.wercker.com/status/7751cf9d910a68b30ab010c5c341eb59/s/master "wercker status")](https://app.wercker.com/project/byKey/7751cf9d910a68b30ab010c5c341eb59)
+[![Code Climate](https://codeclimate.com/github/rgmining/ria/badges/gpa.svg)](https://codeclimate.com/github/rgmining/ria)
+[![Release](https://img.shields.io/badge/release-0.9.0-brightgreen.svg)](https://github.com/rgmining/ria/releases/tag/v0.9.0)
+
+
+This package provides 4 algorithms for review graph mining project.
+[Mutually Reinforcing Analysis (MRA)](http://www.anrdoezrs.net/links/8186671/type/dlg/http://link.springer.com/chapter/10.1007%2F978-3-642-23088-2_25)
+algorithm is an algorithm we've introduced in DEXA 2011,
+[Repeated Improvement Analysis (RIA)](http://db-event.jpn.org/deim2015/paper/253.pdf) algorithm
+is an algorithm we've introduced in DEIM 2015.
+Algorithm **One** has been proposed by Ee-Peng Lim *ea al.* in CIKM 2010, and algorithm **OneSum** is an variation of it made by us.
+
+This package is a part of [Review Graph Mining Project](https://rgmining.github.io/)
+which provides other algorithms, datasets, and helper libraries.
+
+See [the documents](https://rgmining.github.io/ria/) for more information.
+
+
+## Installation
+Use `pip` to install this package.
+
+```
+pip install --upgrade rgmining-ria
+```
+
+## License
+This software is released under The GNU General Public License Version 3,
+see [COPYING](COPYING) for more detail.