Replaced "Bad Ideas" page with "Best Practices Guide"
/docs/extend/basics is now the default page for /docs/extend
Hide banners_content.htmf
Added link to support page from troubleshooting page
Added 3.3.3 release notes
Merge remote-tracking branch 'refs/remotes/github/smart-theme-migration' into smart-theme-migration

Conflicts:
	content/support/index.slim