Add doc title note

astrocyte_pkg.yml

@@ -27,6 +27,7 @@ description: |
 # A list of documentation file in .md format that should be viewable from the
 # web interface. These files are in the 'docs' subdirectory. The first file
 # listed will be used as a documentation index and is index.md by convention
+# To supply a title for documentation use a pair of [ 'filename', 'title' ]
 documentation_files:
   - [ 'index.md', 'ChIPSeq Example' ]