bugfix: Mixpanel link tracking

 On branch master

	modified:   website/_content/1-about/page.md
	modified:   website/_content/page.md
	modified:   website/_themes/pinfinity/layouts/default.html
	modified:   website/_themes/pinfinity/partials/foot-javascript.html
	modified:   website/_themes/pinfinity/partials/social-footer.html
	modified:   website/_themes/pinfinity/templates/book.html