add travis badge for master branch
</h1>
<p align="center">
+ <a href="https://travis-ci.org/jonathanlermitage/intellij-extra-icons-plugin"><img src="https://travis-ci.org/jonathanlermitage/intellij-extra-icons-plugin.svg?branch=master"/></a>
<a href="https://plugins.jetbrains.com/plugin/11058-extra-icons"><img src="https://img.shields.io/jetbrains/plugin/v/11058-extra-icons.svg"/></a>
<a href="https://plugins.jetbrains.com/plugin/11058-extra-icons"><img src="https://img.shields.io/jetbrains/plugin/d/11058-extra-icons.svg"/></a>
<a href="https://github.com/jonathanlermitage/intellij-extra-icons-plugin/blob/master/LICENSE.txt"><img src="https://img.shields.io/github/license/jonathanlermitage/intellij-extra-icons-plugin.svg"/></a>
