[readme] add some comments and add @twadleigh to license

LICENSE.md

@@ -1,6 +1,6 @@
 The Meshing.jl package is licensed under the MIT "Expat" License:
 
-> Copyright (c) 2015: Steve Kelly.
+> Copyright (c) 2015: Steve Kelly, Tracy Wadleigh.
 >
 > Permission is hereby granted, free of charge, to any person obtaining
 > a copy of this software and associated documentation files (the

README.md

@@ -1,3 +1,17 @@
 # Meshing
 
-[![Build Status](https://travis-ci.org/sjkelly/Meshing.jl.svg?branch=master)](https://travis-ci.org/sjkelly/Meshing.jl)
+[![Build Status](https://travis-ci.org/juliageometry/Meshing.jl.svg?branch=master)](https://travis-ci.org/juliageometry/Meshing.jl)
+
+This package provides meshing algorithms for use on distance fields.
+
+## Algorithms
+
+* [Marching Tetrahedra](https://en.wikipedia.org/wiki/Marching_tetrahedra)
+
+## Credits
+
+Marching Tetrahedra was originally implemented by @twadleigh in Meshes.jl.
+
+## License
+
+Available under the MIT "Expat" License, see [LICENSE.md](./LICENSE.md)