Update gitignore and add coveralls to the README file.

.gitignore

@@ -26,3 +26,9 @@ pluglib-bindings.ami
 test-driver
 /test/*.log
 /test/*.trs
+doc/
+.yardoc/*
+coverage/
+.yardoc/
+doc/autodocs
+*.pot

README.md

@@ -1,5 +1,7 @@
 # YaST - The DNS Server Configuration Module #
 
+[![Coverage
+Status](https://coveralls.io/repos/github/yast/yast-dns-server/badge.svg?branch=master)](https://coveralls.io/github/yast/yast-dns-server?branch=master)
 [![Travis Build](https://travis-ci.org/yast/yast-dns-server.svg?branch=master)](https://travis-ci.org/yast/yast-dns-server)
 [![Jenkins Build](http://img.shields.io/jenkins/s/https/ci.opensuse.org/yast-dns-server-master.svg)](https://ci.opensuse.org/view/Yast/job/yast-dns-server-master/)