Add imagemagick version to start of test

Author: Hans Kristian Flaatten

wercker.yml

@@ -10,6 +10,11 @@ build:
           echo "node version $(node -v) running"
           echo "npm version $(npm -v) running"
 
+    - script:
+        name: echo imagemagick information
+        code: |
+            convert --version
+
     - npm-install
     - npm-test