Feature: Make section headers relative links

[benjamincharity]

It would be great if section titles were relative links. This would make it very easy to share a specific section with someone (ie during a discussion via Slack).

It looks as though the section titles already have an associated ID so all that would need to be done is wrap the titles in links.

Example

(clicking 'Colors' would add the ID to the URL so you could share a direct link iemydocs.com/nuclides.html#_Colors)