Removing unused Public field from Shock node structure.
Added release notes.
Updated permissions model for node ACL controller.
Updated the permissions model throughout Shock.  This also fixes a few bugs in the ACL-checking.  Additionally, removed the node load function that required a user id as this is no longer necessary.  Permissions should now only be checked in the controller section of the server code.
Added a release notes file and updated the version to 0.9.2
Merge pull request #236 from jaredbischof/develop

Updated the permissions model throughout Shock. See comments and commits.