Check for nil before attempting to insert the objectSyncID into a dictionary.
Merge branch 'develop' of github.com:nothirst/TICoreDataSync into develop
Inserted a check to make sure that a sync object responds to a selector before asking it to perform said selector.

Conflicts:
	TICoreDataSync/02 Primary Classes/Generic Operations/TICDSSynchronizationOperation.m
Revert "Inserted a check to make sure that a sync object responds to a selector before asking it to perform said selector."

This reverts commit 6e309b0710f9306e5135ae5aec95297d59c4ca8b.
Check for nil when doing equality testing and make sure not to insert nil into the dictionary.
Fix an incorrect delegate callback method signature for the DBRestClient copy file request.
Updated to the latest DropboxSDK
Merge branch 'develop' of github.com:nothirst/TICoreDataSync into feature/dropboxsdk

Conflicts:
	TICoreDataSync-iOS.xcodeproj/project.pbxproj
	TICoreDataSync/02 Primary Classes/DropboxSDK-Based Sync/Operations/TICDSDropboxSDKBasedDocumentClientDeletionOperation.m
	TICoreDataSync/02 Primary Classes/DropboxSDK-Based Sync/Operations/TICDSDropboxSDKBasedDocumentDeletionOperation.m
	TICoreDataSync/02 Primary Classes/DropboxSDK-Based Sync/Operations/TICDSDropboxSDKBasedDocumentRegistrationOperation.m
	TICoreDataSync/02 Primary Classes/DropboxSDK-Based Sync/Operations/TICDSDropboxSDKBasedWholeStoreUploadOperation.m