Documentation: Add release status image
# Elektra
+[![Release](https://img.shields.io/github/release/ElektraInitiative/libelektra.svg)](https://github.com/ElektraInitiative/libelektra/releases/latest)
[![Travis Build Status](https://travis-ci.org/ElektraInitiative/libelektra.svg?branch=master)](https://travis-ci.org/ElektraInitiative/libelektra)
_Elektra serves as a universal and secure framework to access configuration
