Fix a section title
Add naming convension on URL
Rename - pid_from_purl
Rename variables to follow the naming convention
Merge branch 'tidy-up-code-on-urls'

Close gh-117.
Record shared supply
Add record_supply
Add supplies:log with dummy content
Extend child_pids_from_pid for dynamic contents
Generate supplies:log content dynamically
Rename - PID_TO_CHILD_PAGE_HINTS_TABLE
Rename variables for PID_TO_CHILD_PAGE_HINTS_TABLE
Rename - child_page_hints_from_pid
Rename variables for child_page_hints_from_pid
Return "hints" from child_page_hints_from_pid
Allow using an arbitrary object as a hint
Show excerpt and logged timing in page list items
Adjust style for enhanced page list items
Return useful "hints" for recorded supplies
Render undefined placeholders as empty strings