og 7.x-1.1

Changes since RC4:

• Don't use metadata inside metadata callback.
• #1250004 by andypost: Changed Change file permissions to 644 for all files
• #1249142 by pillarsdotnet: Remove $account from og_context().
• Do a better check for access and if user is already a member, before showing subscribe page.
• If user is blocked, they should not be able to apply for membership.
• Document specific Entity API hooks for group, membership and membersihp
• Fix OgMembership class name.
• #1238068 by mh86: Fixed og_group() when group audience field is empty.