Update links in README.md

Author: simonbyrne

README.md

@@ -1,7 +1,7 @@
 # Quadmath.jl
 
-[![Travis Build Status](https://travis-ci.org/simonbyrne/Quadmath.jl.svg?branch=master)](https://travis-ci.org/simonbyrne/Quadmath.jl)
-[![Appveyor Build status](https://ci.appveyor.com/api/projects/status/wx46vbwmu2ey5qkj?svg=true)](https://ci.appveyor.com/project/simonbyrne/quadmath-jl)
+[![Travis Build Status](https://travis-ci.org/JuliaMath/Quadmath.jl.svg?branch=master)](https://travis-ci.org/JuliaMath/Quadmath.jl)
+[![Appveyor Build status](https://ci.appveyor.com/api/projects/status/wx46vbwmu2ey5qkj/branch/master?svg=true)](https://ci.appveyor.com/project/simonbyrne/quadmath-jl/branch/master)
 
 This is a Julia interface to libquadmath, providing a `Float128` type corresponding to the IEEE754 binary128 floating point format.
 
@@ -16,7 +16,7 @@ Quadmath currently works on x86_64 Linux and macOS.
 
 ## Installation
 ```julia
-Pkg.clone("https://github.com/simonbyrne/Quadmath.jl")
+Pkg.clone("https://github.com/JuliaMath/Quadmath.jl")
 ```
 
 ## Acknowledgements