Mark all Normative Statements with RFC2119 terms and format to identify in the specification text

1) Each statement shall use RFC2119 terms and those terms shall be put in upper case 2) Each statement shall be given a unique identifier 3) Each statement shall be given formatting to clearly separate it from the surrounding text Attached to this issue is a sample of the WD01 version spec with some of the normative statements marked up using one possible approach that satisfies these 3 items. See section 2.7.2 from line 217 to 249. Here each normative statement: a) has RFC2119 words in uppercase b) each statement is preceded by a unique label based on the section number and a count: e.g. [R2.7.2-4] c) Each normative statement starts on a new line and ends with a line break d) Each normative statement is picked out in a highlight colour (yellow in the sample document. Of course, the details are open to debate, but the principles are clear.