v5.6.1

Fixes

• corrections to [email protected]
• use box-shadow hack for borders affecting vertical rhythm (box-shadow may replace .border-vert(all)). See /docs/tools.md#box-shadow-hack.
• fixes typographical block selectors & adds form element
• removes list-style from dl elements
• code clarification & optimization
• add initial values to grid fallback mixins
• fixes & updates to documentation & comments
• adds "jump to top" ax link to docs & repositions inner page contents on Large+ screens