[Couchbase] Created new bindings, porting Grocery Sync sample app.
[Couchbase] Fixed stale Readme.md entry.
[Couchbase] Updated startup images.
[Couchbase] Updated custom build to fix a ivar scope issue.  Added some comments.
[Couchbase] Ported delete functionality. Added resources.
[Couchbase] Added sync functionality.
[Couchbase] Added missing [AllowNull]. Cleanup of sync UI.
[Couchbase] Removed objc namespace prefix from all non-UIKit derived classes.
Merge pull request #165 from mono/couchbaselite-ios

[Couchbase] Created new bindings, porting Grocery Sync sample app.