Update Readme.md

Author: PrecociouslyDigital

Readme.md

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 Dozer is a framework for robots built with [WPILib](https://github.com/wpilibsuite) to help write fluent, readable code.
 
+Build: [![CircleCI](https://circleci.com/gh/FRC-Dozer/Dozer/tree/master.svg?style=svg)](https://circleci.com/gh/FRC-Dozer/Dozer/tree/master)
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 ## Features
 
 * A task scheduler that allows you to write your robot logic as coroutines