message: Add conda package badges
diff: [![Build Status](https://travis-ci.org/GUDHI/gudhi-devel.svg?branch=master)](https://travis-ci.org/GUDHI/gudhi-devel)
  [![CircleCI](https://circleci.com/gh/GUDHI/gudhi-devel/tree/master.svg?style=svg)](https://circleci.com/gh/GUDHI/gudhi-devel/tree/master)
  [![Build status](https://ci.appveyor.com/api/projects/status/976j2uut8xgalvx2/branch/master?svg=true)](https://ci.appveyor.com/project/GUDHI/gudhi-devel/branch/master)
  +[![Anaconda Cloud](https://anaconda.org/conda-forge/gudhi/badges/version.svg)](https://anaconda.org/conda-forge/gudhi)
  +[![Anaconda downloads](https://anaconda.org/conda-forge/gudhi/badges/downloads.svg)](https://anaconda.org/conda-forge/gudhi)
  ![GUDHI](src/common/doc/Gudhi_banner.png "Topological Data Analysis (TDA) and Higher Dimensional Geometry Understanding")
  