Change to statement id description

We now say elsewhere that statement ID SHOULD be set by the activity provider
Section 4 headings to verb
Merge pull request #126 from garemoko/section4headings

headings as far as verb (inclusive)
heading changes down to the end of context
Merge pull request #127 from garemoko/objectheadings

heading changes down to the end of context
headings down to end of section 4
Merge pull request #128 from garemoko/headingsTimestamp

more headings down to end of section 4
sections 5 and 6 headings
Merge pull request #129 from garemoko/headings5

sections 5 and 6 headings
added Appendix E: Converting Statements to 1.0