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sign-0.4.4: README.md

sign
====

[![Build Status](https://secure.travis-ci.org/msakai/sign.png?branch=master)](http://travis-ci.org/msakai/sign) [![Build status](https://ci.appveyor.com/api/projects/status/txxfj27tg5ee6ma2/branch/master?svg=true)](https://ci.appveyor.com/project/msakai/sign/branch/master) [![Hackage](https://img.shields.io/hackage/v/sign.svg)](https://hackage.haskell.org/package/sign) [![Coverage Status](https://coveralls.io/repos/msakai/sign/badge.svg)](https://coveralls.io/r/msakai/sign)
[![License](https://img.shields.io/badge/License-BSD%203--Clause-blue.svg)](https://opensource.org/licenses/BSD-3-Clause)

Arithmetic over signs (i.e. {-,0,+}) and sets of signs