Updating GitHub contributors

preface.asciidoc

@@ -198,16 +198,25 @@ Many contributors offered comments, corrections and additions to the early-relea
 
 ===== (Name - Github ID)
 
-* *Minh T. Nguyen - enderminh: Github contribution editor*
-* Erik Wahlström - erikwam
-* Eric Winchell - winchell
+* *Minh T. Nguyen - enderminh: Github contribution editor*
+* Ed Eykholt - edeykholt
+* Michalis Kargakis - kargakis
+* Erik Wahlström - erikwam
 * Richard Kiss - richardkiss
+* Eric Winchell - winchell
 * Sergej Kotliar - ziggamon
-* Nagaraj Hubli - nagarajhubli
-* Michalis Kargakis - kargakis
-* Ish Ot Jr. - ishotjr
+* Nagaraj Hubli - nagarajhubli
+* ethers
 * Alex Waters - alexwaters
-* Mihail Russu - MihailRussu
+* Mihail Russu - MihailRussu
+* Ish Ot Jr. - ishotjr
 * James Addison - jayaddison
-* Joe Bauers - joebauers
-* Stephan Oeste - Emzy
+* Nekomata - nekomata-3
+* Simon de la Rouviere - simondlr
+* Chapman Shoop - belovachap
+* Holger Schinzel - schinzelh
+* effectsToCause - vericoin
+* Stephan Oeste - Emzy
+* Joe Bauers - joebauers
+* Jason Bisterfeldt - jbisterfeldt
+* Ed Leafe - EdLeafe