Merge pull request #512 from ljwolford/master

Included revision history links
Remove 4.3 Validation of Voided

Resolves issue #327
Merge pull request #8 from adlnet/master

update from adl master
All values are case insensitive. Closes https://github.com/adlnet/xAPI-Spec/issues/498
SHOULD not MUST for previous commit
Addresses https://github.com/adlnet/xAPI-Spec/issues/433
Merge pull request #519 from garemoko/7_6_tidyup

Addresses #433
Merge pull request #516 from garemoko/case-sensitivity

Case sensitivity for values
POST statements returns an array of statement ids
minor markdown syntax fix
Merge pull request #521 from garemoko/7_2_4_markdownfix

minor markdown syntax fix
Merge pull request #9 from adlnet/master

update from adl master
Clarifies what should be returned when no statements are matched

This is already the behavior of (at least) all major LRS.
Make explicit type of activityId
Make explicit type of agent
Merge pull request #523 from garemoko/stmts-post-returns-array

POST statements returns an array of statement ids
minor tidy up in section 7
Update my org in contributor list
Merge pull request #530 from garemoko/rustici-software

Making things official
Merge pull request #515 from andyjohnson/master

Remove 4.3 Validation of Voided