REC Preparation v1

[mmccool]

Prepare Discovery specification for REC publication.

• index.html copied to publication/6-rec, file updated to REC status, previously as PR, dates updated
• Resolve missing external file inclusions (files inlined)
• Add errata link (currently pointing at MD file in github repo, we should discuss where and in what format this file should be)
• Export as static (may have to redo as make changes to index.html)
• Run HTML tidy, generate Overview.html (and errs.txt)

To do:

• Testing (various tools...) - need to make available via URL first

[mmccool]

Merging so can get files into staging area and use github.io URL for testing with remaining tools.