Update CONTRIBUTORS.md

CONTRIBUTING.md

@@ -8,6 +8,7 @@ Math.NET Numerics is driven by the community and contributors like you. I'm exci
 ## Getting Started
 
 - Make sure you have a [GitHub account](https://github.com/signup/free), it's free.
+- Please configure a proper name and email address in git ([how to](https://help.github.com/articles/set-up-git)).
 - Fork the [mainline repository](https://github.com/mathnet/mathnet-numerics) on GitHub ([how to](https://help.github.com/articles/fork-a-repo)).
 
 We use the [Fork & Pull Model](https://help.github.com/articles/using-pull-requests/), as common for GitHub projects. If you've already contributed to another GitHub project then you're all set. If not, [here is another  introduction](https://gun.io/blog/how-to-github-fork-branch-and-pull-request/).

CONTRIBUTORS.md

@@ -10,28 +10,30 @@ The Math.NET project is a community effort. We accept contributions and pull req
 
 ### Contributors
 
-*ordered by #commits*
+*ordered by #commits, then alphabetically*
 
-- [Christoph Rüegg](http://christoph.ruegg.name/)
+- [Christoph Rüegg](http://christoph.ruegg.name/) (cdrnet)
 - [Marcus Cuda](http://marcuscuda.com/)
 - Jurgen Van Gael
-- Alexander Karatarakis
+- Alexander Karatarakis (Danimoth)
 - Gustavo Guerra
+- Thomas Ibel (tibel)
 - Hani Medhat
 - manyue
-- tibel
-- Andriy Bratiychuk
-- Phil
+- Andriy Bratiychuk (Abratiychuk)
 - Artyom Baranovskiy
+- Phil Cleveland (Phil)
+- Scott Stephens
 - Patrick van der Valde
-- cureos
+- Anders Gustafsson (cureos)
 - Andrew Kazyrevich
-- Scott Stephens
+- Iain McDonald (lifebeyondfife)
+- Candy Chiu
+- Gauthier Segay
 - Gregor959
 - IUser
-- Iain McDonald
 - Iain Sproat
-- Kosei ABE
+- Kosei ABE (kos59125)
 - Till Hoffmann
 - Tomas Petricek
 - VicPara