Add Travis badge and coveralls badge to readme.

Author: MatthieuDartiailh

README.md

@@ -1,6 +1,9 @@
 Lantz_core
 ==========
 
+[![Build Status](https://travis-ci.org/LabPy/lantz_core.svg)](https://travis-ci.org/LabPy/lantz_core)
+[![Coverage Status](https://coveralls.io/repos/LabPy/lantz_core/badge.svg?branch=master&service=github)](https://coveralls.io/github/LabPy/lantz_core?branch=master)
+
 Lantz is an automation and instrumentation toolkit with a clean, well-designed
 and consistent interface. It provides a core of commonly used functionalities
 for building applications that communicate with scientific instruments