tiny typo
rewrite of 4.1.2 Actor

plus some changes to identified group property table
forgot change two words
and a typo...
Merge branch 'master' of https://github.com/adlnet/xAPI-Spec
Updated rewrite of 4.1.2 Actor

based on Andrew's and Russel's review comments. Thanks.
* Renamed sha-2 and content-Type properties to sha2 and contentType for easier reference as properties
(many languages don't like - in property names)

* Added clarifying requirements
* Added requirement to include hash in each part's header, so receiver doesn't
have to guess which hash length to use when verifying

* Added an example
minor clarification:
"only send one copy" language only applies within a single message
Added flag to include/exclude attachments when retreiving statements
(trivial) updated example hash

Hash in the example was calculated improperly, updated with correct hash.
Removed 'authoritative' flag

Shouldn't be controversial, I think we talked about removing this in 0.95 but just forgot to.

For those new to the discussion: this is a holdover from when the LRS was "smarter" than it is now -- we've decided it's up to systems reading statement to decide how to weigh statements.
Merge pull request #86 from paul-esch/master

Rewrite of 4.1.2 Actor
Merge pull request #88 from bscSCORM/nonauthoritative

Removed 'authoritative' flag
Merge pull request #87 from bscSCORM/binary

Attachment example, clarifications, minor changes