Merge pull request #1 from JeniT/develop

Added cell-based selections
minor edits
published draft-hausenblas-csv-fragment-01
added links to https://github.com/dret/I-D to all drafts
removed slices
added skeleton for atom-profile draft
added profile parameter to media type
removed row=* as computing the number of rows
removed any special support for header rows
cleanup
getting closer to -00 shape
copy/paste XSD from RFC 5261
copy/paste of types and errors XSDs from RFC 5261
first minimal version of a patch document format schema
made RFC XXXX the convention for final editing
error schema and media type already exist
completed -02
added RFC 5261 XSD as appendix
adding XXXX convention to examples
added full names in acknowledgements section