Merge pull request #3 from ndw/xproc20

Clear out the errata document
Merge pull request #4 from ndw/xproc20

Updated README
Merge pull request #5 from ndw/xproc20

Fixed typo
Merge pull request #8 from ndw/xproc20

Fixed markdown typo: use * not / for italics
Merge pull request #10 from ndw/xproc20

Added namespace documents to build process
Merge pull request #11 from ndw/xproc20

Added the V2 requirements document