contributions:

Krisztian Fekete
Marc Abramowitz
Aleaxner Schepanovski
Sridhar Ratnakumar
Barry Warsaw
Chris Rose
Jannis Leidl
Ronny Pfannschmidt
Lukasz Balcerzak 
Philip Thiem
Monty Taylor
Bruno Oliveira
Ionel Maries Cristian
Anatoly techntonik
Matt Jeffery
Chris Jerdonek
Ronald Evers
Carl Meyer
Anthon van der Neuth
Matt Good
Mattieu Agopian
Asmund Grammeltwedt
Ionel Maries Cristian
Julian Krause
Alexandre Conrad
Morgan Fainberg
Marc Schlaich
Clark Boylan
Eugene Yunak
Mark Hirota