markup: auto
formats: [original]
widths: [400, 600, 800, 1000]
fallback_width: 800
fallback_format: original
noscript: false
link_source: false
quality: 75
data_sizes: true
gravity: center

markup: auto
formats: [original]
widths: [400, 600, 800, 1000]
fallback_width: 800
fallback_format: original
noscript: false
link_source: false
quality: 75
data_sizes: true
gravity: center
dimension_attributes: false

Set dimension_attributes default value to false
Set dimension_attributes default value to false

I'm disabling it by default for 2 reasons:
- Enabling it would change the output markup on existing sites,
  technically requiring a major version change.
- These attributes require certain CSS or your images will be screwy.
