Create html website for paper with dates, sidebar, mobile friendly

[rencryptofish]

Closes #73

Creates a HTML website with javascript functions that adds:

• published date + last updated date (pulled from last commit date)
• mobile friendly (should render on dynamic sizing + mobile)
• hover on footnotes creates a tooltip
• sidebar is an improved table of contents for those reading on the website
• scrolling on the page should update the highlighted section in the sidebar + update the link in the browser as the reader scrolls
• seo metadata
• fixes the image path for /img/bitcoin_core_upgrade_time.png to img/bitcoin_core_upgrade_time.png (so it conforms with out images and renders on website)

The site is deployed on https://www.rencryptofish.com/bcap/ for testing (I will pull down after this merges)

[moneyball]

Looks great!

I don't see the footnotes though at https://www.rencryptofish.com/bcap/#key-questions-for-stakeholders

Can you look into why they're not showing up?

[rencryptofish]

Looks great!

I don't see the footnotes though at https://www.rencryptofish.com/bcap/#key-questions-for-stakeholders

Can you look into why they're not showing up?

We don't have any footnotes there at the moment https://bitcoin-cap.github.io/bcap/#key-questions-for-stakeholders (checked the pdf and markdown version at README.md), we only have 33 footnotes

[moneyball]

I didn't intend to share that deep link. I am not seeing any footnotes at all on the web page. They've disappeared.

[moneyball]

Ok I now understand how the footnotes work :)