fix: add long description and homepage url to the shed

Author: rmassei

tools/cellprofiler/.shed.yml

@@ -3,6 +3,10 @@ owner: bgruening
 categories:
   - Imaging
 description: cellProfiler wrapper
+homepage_url: https://github.com/CellProfiler
+long_description: |
+  CellProfiler is a free open-source software designed to enable biologists without training in computer 
+  vision or programming to quantitatively measure phenotypes from thousands of images automatically.
 remote_repository_url: https://github.com/bgruening/galaxytools/tree/master/tools
 type: unrestricted
 auto_tool_repositories: