Ignore comments and empty lines in plugins file
diff --git a/plugins.sh b/plugins.sh
index e0df32b..ec9f368 100755
--- a/plugins.sh
+++ b/plugins.sh
@@ -13,5 +13,7 @@
 
 while read spec; do
     plugin=(${spec//:/ }); 
+    [[ ${plugin[0]} =~ ^# ]] && continue
+    [[ ${plugin[0]} =~ ^\s*$ ]] && continue
     curl -L ${JENKINS_UC}/download/plugins/${plugin[0]}/${plugin[1]}/${plugin[0]}.hpi -o $REF/${plugin[0]}.hpi;
 done  < $1