Update README.md

Author: longshorej

README.md

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 [![Crates.io](https://img.shields.io/crates/v/csi.svg?style=flat-square)](https://crates.io/crates/csi)
 [![Crates.io](https://img.shields.io/crates/d/csi.svg?style=flat-square)](https://crates.io/crates/csi)
-[![CircleCI](https://img.shields.io/circleci/project/github/longshorej/csi/master.svg?style=flat-square)](https://circleci.com/gh/longshorej/csi)
+[![Travis CI](https://img.shields.io/travis/longshorej/csi.svg?style=flat-square)](https://travis-ci.org/longshorej/csi)
 
 CSI -- client-side includes - is a tool for processing a directory of text files. It allows you to define files that include other files, and substitute variables.