Responsive Media - figcaption example

[gordongrace]

Update responsive-media - image example to include figure and figcaption elements for complex examples.

Relieve SM7 of the burden of maintaining examples like:

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For graphs and diagrams (illustrations) published in HTML:

Use the

element to associate the caption with the illustration.
Include appropriate alt text in the

element.
Hyperlink in-text references to the figure number and title only if it helps the user.
Example
Example: a caption for a graph showing changes in Victoria's kangaroo population

Figure 3: Kangaroo numbers in Victoria, 1880 to 1980