Add DMX4Artists contribution.

Author: prisonerjohn

.gitignore

@@ -23,3 +23,4 @@ about/
 contrib_generate/contribs.txt # File now built on the server side; don't need to track here
 contrib_generate/contributions.txt # File now built on the server side; don't need to track here
 *~
+/bin/

contrib_generate/sources.conf

@@ -1,4 +1,4 @@
-# Next ID: 268
+# Next ID: 269
 # Increment after assigning ID to new contribution
 
 [Library : 3D]
@@ -136,6 +136,7 @@
 238 \ https://github.com/cansik/realsense-processing/releases/download/contributed/RealSenseProcessing.txt
 239 \ http://skweezee.net/processing/download/SkweezeeForProcessing.txt
 266 \ https://github.com/sgeigers/SimplePhidgets/releases/download/latest/SimplePhidgets.txt
+268 \ http://github.com/jaysonh/Dmx4Artists/releases/latest/download/Dmx4Artists.txt
 
 [Library : I/O]
 001 \ https://github.com/remixlab/proscene/releases/download/latest/proscene.txt