Merge pull request #21 from adlnet/master

update garemoko master to adlnet
section 7 headings
Appendix headings
Merge pull request #136 from garemoko/apendixHeadings

Apendix headings
Merge pull request #135 from garemoko/headings7vers2

attempt #2 at section 7 headings
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec