Resolve "xcor.py, --random-source fails if file is too small"

Closes #30 (closed)

PR checklist

• This comment contains a description of changes (with reason)
• If you've fixed a bug or added code that should be tested, add tests!
• CHANGELOG.md is updated

workflow/conf/biohpc.config

@@ -65,7 +65,7 @@ process {
     cpus = 32
   }
   withName: multiqcReport {
-    module = ['python/3.6.1-2-anaconda', 'pandoc/2.7', 'multiqc/1.7']
+    module = ['python/3.6.1-2-anaconda', 'pandoc/2.7', 'singularity/3.0.2']
     executor = 'local'
   }
 }