4.1 optional/recommended/mandatory
Section 6.0-6.3 Edits

Moved some text around, please note requirements
separation/recategorization.  Changed Runtime to Run-time.
Section6.4 Edits

Moved some sections and changed some headings.  Added a link where
appropriate.
IRL Definition

We never really got a chance to clarify usage in the document.  Rather
than root it out at each place, let's just define IRL.  If it doesn't
stick for the next version, we can figure out what rules we really mean
surrounding it then.
Version not recommended
Changed Sub-Statement to SubStatement when reffering to objectType
Merge pull request #410 from garemoko/substatement

Use Substatement instead of Sub-statement for objecttype
Ben comment updates

Updated 1.0.0 to 1.0.1 in correct places. I removed the Header
Requirement as it was confusing, kept the LRS requirement and added new
Client requirements.  The language was modified slightly and moved into
details.
Fixed conflict, changed above to below
Update xAPI.md

Missing hash mark on Language Map link in Object section (4.1.4.1).
Added Appendix H: Table of Endpoints

Endpoint Table and updated TOC
Merge pull request #411 from zachlowry/patch-1

Update xAPI.md
CopyPaste Issue
and extra level of activities eliminated
one more extra activities
Removed /xapi part of endpoint

Considered part of base IRI
Remove / as the xapi prefix went.
Fixed "statements" in 6.3

As per the Sept meeting
Merge pull request #397 from andyjohnson/section6edits

Section 6.0-6.3 Edits
Merge pull request #398 from andyjohnson/6.4edits

Section6.4 Edits