Simperium 2.0 Release

[jleandroperez]

For simplicity reasons, i'm wrapping up a list of legacy issues into a single list of features for the Simperium 2.0 release.

• Issue Support binary data #8: Implement Binary Sync
• Issue Document how to use Binary Sync #187: Document Binary Sync API
• Issue Relationships Must Be Marked As Optional #14: Add support for Mandatory Relationships
• Issue Allow syncing without Core Data #40: Allow Sync'ing without CoreData: Make SPJsonStorage production-ready
• Issue Support document-based apps #45: Support Document Based Apps
• Issue Move metadata writes to be atomic with datastore writes + improve performance #124: Metadata Storage should be atomic
• Issue Amount of objects left to be synched #136: Sync Status Callbacks: Inform the number of objects yet to be sync'ed.
• Issue Complete implementation of SPUser's 'customObject' stub methods #149: Add userInfo field to SPUser, and sync it via Simperium
• Issue Feature Request: instance-level syncing of entities #150: Support Instance-Level Sync'ing
• Issue Find a simpler way to setup the CoreData Model #200: Simplify Core Data setup