Replace exisiting smilies with equivalent emoji, or with shiny new smiley images where no emoji existed.
Props batmoo, joen and mkaz for the original plugin upon which this is based.
Props pento, iseulde, kraftbj and peterwilsoncc for making the internet's dreams come true.
See #31242
Built from https://develop.svn.wordpress.org/trunk@31733
git-svn-id: http://core.svn.wordpress.org/trunk@31714 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Gary Pendergast