CONTRIBUTORS: add all past code contributors, convert to markdown

(cherry picked from commit a081e06)

Author: lifeforms

CONTRIBUTORS

@@ -0,0 +1,45 @@
+## Project Lead:
+
+- [Chaim Sanders](https://github.com/csanders-git)
+
+## Core Developers:
+
+- [Christian Folini](https://github.com/dune73)
+- [Walter Hop](https://github.com/lifeforms)
+
+## Developers:
+
+- [Franziska Bühler](https://github.com/franbuehler)
+- [Christoph Hansen](https://github.com/emphazer)
+- [Victor Hora](https://github.com/victorhora)
+
+## Contributors:
+
+- [Zack Allen](https://github.com/zmallen)
+- [Ryan Barnett](https://github.com/rcbarnett)
+- [Jeremy Brown](https://github.com/jwbrown77)
+- [Jonathan Claudius](https://github.com/claudijd)
+- [Ashish Dixit](https://github.com/tundal45)
+- [FrozenSolid](https://github.com/frozenSolid)
+- [Michael Haas](https://github.com/MichaelHaas)
+- [jamuse](https://github.com/jamuse)
+- [Krzysztof Kotowicz](https://github.com/koto)
+- [Evgeny Marmalstein](https://github.com/shimshon70)
+- [Christian Mehlmauer](https://github.com/FireFart)
+- [Glyn Mooney](https://github.com/skidoosh)
+- [Robert Paprocki](https://github.com/p0pr0ck5)
+- [Christian Peron](https://github.com/csjperon)
+- [Elia Pinto](https://github.com/yersinia)
+- [Brian Rectanus](https://github.com/b1v1r)
+- [Federico G. Schwindt](https://github.com/fgsch)
+- Ofer Shezaf
+- Breno Silva
+- Marc Stern
+- [Ben Williams](https://github.com/benwilliams)
+- [Greg Wroblewski](https://github.com/gwroblew)
+- [ygrek](https://github.com/ygrek)
+- [Zino](https://github.com/zinoe)
+- [Felipe Zimmerle](https://github.com/zimmerle)
+- Josh Zlatin
+- [Zou Guangxian](https://github.com/zouguangxian)
+- [4ft35t](https://github.com/4ft35t)