Merge pull request #1447 from pjackson28/v3.0

Added missing clear in tabbed interface working examples
Merge pull request #1449 from pjackson28/v3.0

More placeholders/extends for Grids responsive
Merge pull request #1453 from pjackson28/v3.0

Corrected nesting issues in Grids
Merge pull request #1465 from pjackson28/v3.0

Changed print font to Times New Roman
Merge pull request #1470 from pjackson28/v3.0

Removed Optimal Content Example with details/summary in the table caption. Added side menu to Optimal Content Example Table Simplification page
Merge pull request #1472 from pjackson28/v3.0

Split Web Accessibility Assessment Methodology CSS and JS out of pe-ap
Remove dangling wamethod sass references.
Merge pull request #1474 from pjackson28/v3.0

Remove dangling wamethod sass references
Merge branch 'v3.0'