Fix HTML content to match new recipe

[ddbeck]

Now that #74 is done, we need to update the content that does not comply with the new HTML recipe. These take a few forms:

• Entries that are missing sections (e.g., see_also)
• Entries that contain deprecated sections (e.g., usage_notes)

Here's a list from #55:

content/html/reference/elements/abbr
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/address
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/article
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/aside
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/audio
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/b
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/base
  Missing sections: [ 'see_also' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/blockquote
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/body
  Missing sections: [ 'overview' ]
content/html/reference/elements/br
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/button
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/canvas
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/caption
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/cite
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/code
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/data
  Missing sections: [ 'overview' ]
content/html/reference/elements/datalist
  Missing sections: [ 'overview' ]
content/html/reference/elements/dd
  Missing sections: [ 'overview' ]
content/html/reference/elements/del
  Missing sections: [ 'overview' ]
content/html/reference/elements/dfn
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/dialog
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/div
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/dl
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/em
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/embed
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/figcaption
  Missing sections: [ 'overview' ]
content/html/reference/elements/figure
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/footer
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/h1-h6
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/head
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/header
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/html
  Missing sections: [ 'overview' ]
content/html/reference/elements/i
  Missing sections: [ 'overview' ]
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/iframe
  Missing sections: [ 'see_also' ]
content/html/reference/elements/kbd
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/label
  Contains deprecated sections: [ 'usage_notes' ]
content/html/reference/elements/legend
  Missing sections: [ 'overview' ]
content/html/reference/elements/li
  Missing sections: [ 'overview' ]
content/html/reference/elements/table
  Missing sections: [ 'overview' ]
content/html/reference/elements/video
  Contains deprecated sections: [ 'usage_notes' ]

---

Acceptance criteria:

• [ ] All HTML pages in stumptown-content have required sections
• [ ] All HTML pages in stumptown-content do not have deprecated sections
• [ ] Changes mades to HTML pages in stumptown-content are reflected in their wiki page equivalents