display 0.2.1+1

Material metrics for an area of the screen. Determine device type, column width, etc.

0.2.1

• Add example
• Make pub happy.

0.2.0

• Add fourColumnWidth getter
• Rename doubleColumnWidth to twoColumnWidth.

0.1.2

• Add multiColumnWidth()

0.1.1

• Add more getters for content, column, and double-column widths.
• Allow overriding the material suggested margins and gutters.

0.1.0

• Update with latest material design guidelines.
• Use const constructor.

[0.0.2] - August 25, 2018

• Fix docs.

[0.0.1] - August 25, 2018

• First release.