Wet-run test data (#303)

* Wet-run test data

* typos & clarifications

docs/contributing/contributing.md

@@ -75,6 +75,10 @@ from the `hippunfold` folder that contains the
     cd hippunfold
     snakemake -np
 
+## Wet-run testing your workflow:
+
+Opensource data has been made available for wet-run testing any changes to HippUnfold on OSF [here](https://osf.io/k2nme/). These are real opensource data meant ot span a wide array of HippUnfold use cases with various modalities, resolutions, developmental stages, and species. Please note that some changes to hippUnfold will impact all worflows and should be run and then visually inspected for all these cases. Other changes may impact only one workflow (e.g. adding a new template) and so the recommended run parameters should be adjusted accordingly. 
+
 ## Instructions for Compute Canada
 
 This section provides an example of how to set up a `pip installed` copy