add contribution information

Author: luowh35

src/measure/compute_chunk.cu

@@ -15,10 +15,14 @@
 
 /*----------------------------------------------------------------------------80
 Compute chunk-averaged properties using coordinate-based spatial binning.
+
+Contributed by Wenhao Luo (Sun Yat-sen University).
+
 Syntax:
   compute_chunk <sample_interval> <output_interval>
     bin/1d <dim> <origin> <delta>
     temperature [density/number] [density/mass] [vx] [vy] [vz] [fx] [fy] [fz]
+
 Output: compute_chunk.out
 ------------------------------------------------------------------------------*/