Add docstub (#71)

Author: bsipocz

content/utilities/index.md

@@ -37,6 +37,13 @@ body = '''
 A framework for building checks designed to check to see if a repository follows guideline.
 '''
 
+[[item]]
+type = 'card'
+header = '[docstub](https://github.com/scientific-python/docstub/)'
+body = '''
+A tool for generating Python stub files from docstrings.
+'''
+
 [[item]]
 type = 'card'
 header = '[changelist](https://github.com/scientific-python/changelist/)'