Add workflow template

resources/templates/Workflow.cwl

+class: Workflow
+cwlVersion: v1.0
+id: fillhere
+label: fillhere
+inputs: []
+outputs: []
+steps: 
+  - id: step_one
+    in: 
+      - id: input_one
+        source:
+          - sourcename
+    out:
+      - id: output_id 
+    run: ./imageplotter.cwl
+    label: imageplotter
+requirements:
+  - class: ScatterFeatureRequirement
+  - class: StepInputExpressionRequirement
+  - class: InlineJavascriptRequirement