Merge pull request #18 from adlnet/master

Syncing
homePage fix, StatementRef UUID fix, Identified Group table fix

Updated inconsistent homepage to homePage (1 occur)
Clarified StatementRef UUID requirements (2 occur)
Updated Identified Group table to be consistent with requirement (1 occur)
URI -> IRI

Replaced URI/URL with IRI/IRL.

Did not replace reference in version history (since 0.95 specififed URI).
Also did not replace "mailbox URI" or "openid URI", since these are defined to be URIs by other standards.
mailto URI -> mailto IRI

Based on @fugu13 's comment, also changing mailto URI to IRI.
Removed line about URI encoding since it no longer applies
Merge pull request #322 from bscSCORM/IRI

URI -> IRI
Update xAPI.md
Update xAPI.md
Merge pull request #321 from andyjohnson/master

homePage fix, StatementRef UUID fix, Identified Group table fix
Merge pull request #20 from adlnet/master

Sync up!
Re-committ for homePage in line 631
Merge pull request #323 from andyjohnson/master

homePage fix, StatementRef UUID fix, Identified Group table fix
Merge pull request #21 from adlnet/master

Sync!
Update/Restructure 4.1
Reorder 4.1.2 4.1.3 Details before Requirements.  Slight word changes.
Fixed 4.1.4 - Restructured, eliminated confusing headings, Still don't like "Requirements for Metadata"
4.1.5-4.1.8 Just Restructuring
Part 1 Attachments Edit
4.11 and 4.12 restructure/rewrite, includes typo on "applicaton"
Add Description to loose text in 4.0
Update xAPI.md