Update README.md

Author: IainNZ

README.md

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 [![Build Status](https://travis-ci.org/JuliaLang/LightXML.jl.svg?branch=master)](https://travis-ci.org/JuliaLang/LightXML.jl)
 [![Build status](https://ci.appveyor.com/api/projects/status/si07guw1bbn4srtw/branch/master?svg=true)](https://ci.appveyor.com/project/tkelman/lightxml-jl/branch/master)
+[![LightXML](http://pkg.julialang.org/badges/LightXML_0.3.svg)](http://pkg.julialang.org/?pkg=LightXML&ver=0.3)
+[![LightXML](http://pkg.julialang.org/badges/LightXML_0.4.svg)](http://pkg.julialang.org/?pkg=LightXML&ver=0.4)
 
 This package is a light-weight Julia wrapper of [libxml2](http://www.xmlsoft.org), which provides a minimal interface that covers functionalities that are commonly needed: