added image proc test in continuous integration

this test (which runes fiji image processing) will help detect
regressions.

Jenkinsfile

@@ -25,6 +25,11 @@ pipeline {
                 // sh 'mv ~/.bashrc.bak ~/.bashrc'
             }
         }
+        stage('Testing image processing...') {
+            steps {
+                sh './test1.bash'
+            }
+        }
         stage('Building HTML documentation...') {
             steps {
                 echo 'Building HTML documentation...'

test1.bash

@@ -0,0 +1,6 @@
+#!/bin/bash
+wget 'https://downloads.imagej.net/fiji/latest/fiji-linux64.zip'
+unzip './fiji-linux64.zip'
+rm './fiji-linux64.zip'
+./Fiji.app/ImageJ-linux64 --ij2 --headless --run './lipase.py'
+