Partial fix for USERGRID-100: Add the correct A.L. headers to the ios sdk files.
For USERGRID-100, add a NOTICE file and update LICENSE for the SBJson and SSKeychain components in the iOS SDK..
Merge pull request #72 from lgov/USERGRID-100

USERGRID-100 - Add license headers to the iOS sdk files, add NOTICE + update LICENSE.