Update package badges in README

Author: blegat

README.md

@@ -2,8 +2,8 @@
 
 | **Documentation** | **PackageEvaluator** | **Build Status** | **Social** |
 |:-----------------:|:--------------------:|:----------------:|:----------:|
-| [![][docs-stable-img]][docs-stable-url] | [![][pkg-0.5-img]][pkg-0.5-url] | [![Build Status][build-img]][build-url] [![Build Status][winbuild-img]][winbuild-url] | [![Gitter][gitter-img]][gitter-url] |
-| [![][docs-latest-img]][docs-latest-url] | [![][pkg-0.6-img]][pkg-0.6-url] | [![Coveralls branch][coveralls-img]][coveralls-url] [![Codecov branch][codecov-img]][codecov-url] | [<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Discourse_logo.png/799px-Discourse_logo.png" width="64">][discourse-url] |
+| [![][docs-stable-img]][docs-stable-url] | [![][pkg-0.6-img]][pkg-0.6-url] | [![Build Status][build-img]][build-url] [![Build Status][winbuild-img]][winbuild-url] | [![Gitter][gitter-img]][gitter-url] |
+| [![][docs-latest-img]][docs-latest-url] | [![][pkg-0.7-img]][pkg-0.7-url] | [![Coveralls branch][coveralls-img]][coveralls-url] [![Codecov branch][codecov-img]][codecov-url] | [<img src="https://upload.wikimedia.org/wikipedia/commons/thumb/a/af/Discourse_logo.png/799px-Discourse_logo.png" width="64">][discourse-url] |
 
 This package provides an interface for manipulating multivariate polynomials.
 Implementing algorithms on polynomials using this interface will allow the algorithm to work for all polynomials implementing the interface.
@@ -65,10 +65,10 @@ The following packages extend/use the interface:
 [docs-stable-url]: https://JuliaAlgebra.github.io/MultivariatePolynomials.jl/stable
 [docs-latest-url]: https://JuliaAlgebra.github.io/MultivariatePolynomials.jl/latest
 
-[pkg-0.5-img]: http://pkg.julialang.org/badges/MultivariatePolynomials_0.5.svg
-[pkg-0.5-url]: http://pkg.julialang.org/?pkg=MultivariatePolynomials
 [pkg-0.6-img]: http://pkg.julialang.org/badges/MultivariatePolynomials_0.6.svg
 [pkg-0.6-url]: http://pkg.julialang.org/?pkg=MultivariatePolynomials
+[pkg-0.7-img]: http://pkg.julialang.org/badges/MultivariatePolynomials_0.7.svg
+[pkg-0.7-url]: http://pkg.julialang.org/?pkg=MultivariatePolynomials
 
 [build-img]: https://travis-ci.org/JuliaAlgebra/MultivariatePolynomials.jl.svg?branch=master
 [build-url]: https://travis-ci.org/JuliaAlgebra/MultivariatePolynomials.jl