Changeset 4322 for sites/trunk/wordpress.org/public_html/wp-content/themes/pub/wporg-plugins/client/components/plugin/sections/changelog/style.scss

Plugin Directory: Improve Contributors section & Changelog section.

Added Changelog section sass file.
Removed placement of #changelog selector from image-gallery sass.
Added Developers/Contributors php file.
Ported over some earlier changes on React files to the php files.

See #1824