Elevate AS-11 UK DPP SD to "Specification"

[Matthew-Marks]

• [x] Receive confirmation that elevation has been authorised
• [x] Change the IDs of WIP Rules Framework Components to use formal AMWA URLs
• [x] Change the Specification status from "[Work In Progress]" to "[Specification]"
• [x] Create a Tag / Release of the Specification - 1.1.2
• [x] Make spec repository public

(This is an unusual situation because it is the well-tested legacy spec, so fewer steps than normal are required.)