Build status, coverage images should use master branch

Author: Tigge

README.md

@@ -1,8 +1,8 @@
 ANT-FS Command Line Interface
 =============================
 
-[![Build Status](https://img.shields.io/travis/Tigge/antfs-cli.svg?style=flat)](http://travis-ci.org/Tigge/antfs-cli)
-[![Coverage Status](http://img.shields.io/coveralls/Tigge/antfs-cli.svg?style=flat)](https://coveralls.io/r/Tigge/antfs-cli)
+[![Travis branch](https://img.shields.io/travis/Tigge/antfs-cli/master.svg)](https://travis-ci.org/Tigge/antfs-cli)
+[![Coveralls branch](https://img.shields.io/coveralls/Tigge/antfs-cli/master.svg)](https://coveralls.io/r/Tigge/antfs-cli?branch=master)
 
 This program (`antfs-cli`, previously Garmin-Forerunner-610-Extractor or
 Garmin-Extractor) extracts all activity FIT files from a device and writes