HTML5 <progress> and <meter> tags

Some simple test-cases for two new HTML5 tags.

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<progress>

The progress element (spec: 4.10.16) represents the completion progress of a task and can be both indeterminate as determinate.

<meter>

Displaying a scalar measurement within a known range, like hard drive usage, can be done using the meter element (spec: 4.10.17)