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
Merge pull request #1474 from pjackson28/v3.0

Remove dangling wamethod sass references
Merge pull request #1477 from pjackson28/v3.0

Fixed validation error with Table simplification HTML
Cleanup: Extend/placeholder default-print SCSS
Merge pull request #1479 from nschonni/extend-default-print-scss

Cleanup: Extend/placeholder default-print SCSS
[datepicker] Fix 'selected date' indicator
Build: Bump jRuby version for security patch

Bump gems as editing the properties file will already trigger a rebuild
of the vendors directory.
Merge pull request #1482 from nschonni/update-jruby-plus-gems

Build: Bump jRuby version for security patch
Merge pull request #1481 from berubs/selected-date

[datepicker] Fix 'selected date' indicator
Fixes #1469 by stopping build if any step fails