3.0.0

• add rex:ready @dergel
• fix duplicate by pjax call
• editor height range slider don't notice profile update fixed
• add link to profile edit in preview site
• add mform code example to preview site
• add profile info to preview site
• show profile settings add to preview site
• execute building process and add newest cke5 version 11.1.1 with media embed
• add Media embed in default profile
• remove php version requirement to make addon for php7 installable: redaxo/redaxo#2204
• remove supersub plugin, add supsub plugin
• super toolbar key was replaced with sup
• add embed media example to demo page