arrange badges in two rows

Author: eddelbuettel

README.md

@@ -1,9 +1,10 @@
-## Rcpp [![Build Status](https://travis-ci.org/RcppCore/Rcpp.svg)](https://travis-ci.org/RcppCore/Rcpp) [![License](https://eddelbuettel.github.io/badges/GPL2+.svg)](http://www.gnu.org/licenses/gpl-2.0.html) [![CRAN](http://www.r-pkg.org/badges/version/Rcpp)](https://cran.r-project.org/package=Rcpp) [![Dependencies](https://tinyverse.netlify.com/badge/Rcpp)](https://cran.r-project.org/package=Rcpp) [![Downloads](http://cranlogs.r-pkg.org/badges/Rcpp?color=brightgreen)](http://www.r-pkg.org/pkg/Rcpp) [![Coverage Status](https://codecov.io/gh/RcppCore/Rcpp/graph/badge.svg)](https://codecov.io/github/RcppCore/Rcpp?branch=master)
+## Rcpp: Seamless R and C++ Integration
 
-[![JSS](https://img.shields.io/badge/JSS-10.18637%2Fjss.v040.i08-brightgreen)](http://dx.doi.org/10.18637/jss.v040.i08) [![Springer useR!](https://img.shields.io/badge/Springer%20useR!-10.1007%2F978--1--4614--6868--4-brightgreen)](https://www.springer.com/gp/book/9781461468677) [![TAS](https://img.shields.io/badge/TAS-10.1080%2F00031305.2017.1375990-brightgreen)](http://dx.doi.org/10.1080/00031305.2017.1375990)
+[![Build Status](https://travis-ci.org/RcppCore/Rcpp.svg)](https://travis-ci.org/RcppCore/Rcpp) [![License](https://eddelbuettel.github.io/badges/GPL2+.svg)](http://www.gnu.org/licenses/gpl-2.0.html) [![CRAN](http://www.r-pkg.org/badges/version/Rcpp)](https://cran.r-project.org/package=Rcpp) [![Dependencies](https://tinyverse.netlify.com/badge/Rcpp)](https://cran.r-project.org/package=Rcpp) [![Downloads](http://cranlogs.r-pkg.org/badges/Rcpp?color=brightgreen)](http://www.r-pkg.org/pkg/Rcpp) [![Coverage Status](https://codecov.io/gh/RcppCore/Rcpp/graph/badge.svg)](https://codecov.io/github/RcppCore/Rcpp?branch=master)
 
+[![JSS](https://img.shields.io/badge/JSS-10.18637%2Fjss.v040.i08-brightgreen)](http://dx.doi.org/10.18637/jss.v040.i08) [![Springer useR!](https://img.shields.io/badge/Springer%20useR!-10.1007%2F978--1--4614--6868--4-brightgreen)](https://www.springer.com/gp/book/9781461468677) [![TAS](https://img.shields.io/badge/TAS-10.1080%2F00031305.2017.1375990-brightgreen)](http://dx.doi.org/10.1080/00031305.2017.1375990)
 
-### Seamless R and C++ Integration
+### Synopsis
 
 The [Rcpp package](https://cran.r-project.org/package=Rcpp) provides R
 functions and a (header-only for client packages) C++ library greatly