Fix links

Author: mykelk

README.md

@@ -1,8 +1,8 @@
 # TikzGraphs
 
-[![Build Status](https://travis-ci.org/sisl/TikzGraphs.jl.svg)](https://travis-ci.org/sisl/TikzGraphs.jl)
-[![Coverage Status](https://coveralls.io/repos/github/sisl/TikzGraphs.jl/badge.svg?branch=master)](https://coveralls.io/github/sisl/TikzGraphs.jl?branch=master)
+[![Build Status](https://travis-ci.org/JuliaTeX/TikzGraphs.jl.svg)](https://travis-ci.org/JuliaTeX/TikzGraphs.jl)
+[![Coverage Status](https://coveralls.io/repos/github/JuliaTeX/TikzGraphs.jl/badge.svg?branch=master)](https://coveralls.io/github/JuliaTeX/TikzGraphs.jl?branch=master)
 
 This library generates graph layouts using the TikZ graph layout package.
 
-Read the [documentation](http://nbviewer.ipython.org/github/sisl/TikzGraphs.jl/blob/master/doc/TikzGraphs.ipynb).
+Read the [documentation](http://nbviewer.ipython.org/github/JuliaTeX/TikzGraphs.jl/blob/master/doc/TikzGraphs.ipynb).