Largo 0.5.5.4

This is a maintenance release containing bug fixes for v0.5.5.

This release breaks compatibility with PHP versions before 5.5: https://github.com/INN/largo/pull/1407/files#r105924102 If you are still using PHP 5.5 or earlier, please be warned that they no longer receive security patches: https://secure.php.net/eol.php

• Updates some minor documentation
• Fixes a bug where using an image gallery on a post caused the post to scroll to the gallery upon page load (8acc31d)
• Fixes a bug where the current post was included in a list of related posts for the current post (#1403)
• Fixes an undefined warning regarding meta boxes (#1408 for #1406)
• Fixes several undefined notices in featured media functionality (#1350)
• Cleans up inc/helpers.php (#1407)
• Reorders the featured media dialog's UI from "Embed, Video, Image, Gallery" to "Image, Gallery, Video, Embed" (#1408)