Documentation: Fixed various broken links.
Merge pull request #5131 from EricDunsworth/v4.0-broken-link-fixes

Documentation: Fixed various broken links.
Fixed the working example updating the wrong branch
Merge pull request #5133 from LaurentGoderre/fixed-working-examples

Fixed the working example updating the wrong branch
Re-ignored assemble i18n files
Switched to the new i18n integrated task
Removed unused task
Used the new option to use the header row as a value
Fixed numerous broken links and corrected data-ajax plugin references (related to #5131)
Merge pull request #5134 from pjackson28/fixv31infolinks

Fixed numerous broken links (related to #5131)
Progress: Fixed typo in French working example title
Merge pull request #5137 from pjackson28/fixtypo

Progress: Fixed typo in French working example title
Fixed link from menu demos to v3.1 equivalent
Merge pull request #5139 from pjackson28/fixmenuc31link

Fixed link from menu demos to v3.1 equivalent
Data-picture: updated docs with data-class attribute
Data-picture: updated demos with data-class attribute
Data-picture: added support for data-class attribute

Allows the user to apply a CSS class attribute to the image
element create by the plugin.
Merge pull request #5126 from LaurentGoderre/better-i18n

Build: Better i18n
Fixed scss-lint issues
Merge pull request #5155 from LaurentGoderre/fix-scss-lint-issues

Build: Fixed scss-lint issues