Update README.md

Author: afawcett

README.md

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 FinancialForce Apex Common Sample
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+[![Build Status](https://travis-ci.org/financialforcedev/fflib-apex-common-samplecode.svg)](https://travis-ci.org/financialforcedev/fflib-apex-common-samplecode) 
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 **Dependencies:** Must deploy [Apex Common ](https://github.com/financialforcedev/fflib-apex-common) before deploying this library
 
 <a href="https://githubsfdeploy.herokuapp.com?owner=financialforcedev&repo=fflib-apex-common-samplecode">