Moving stores to per-user location
More multi-user support for SmartStore
Moving PN unregistration caused crashes
Changes to store migration on upgrade
Merge pull request #596 from khawkins/multi_user_smartstore

Multi-user SmartStore support
Merge remote-tracking branch 'upstream/unstable' into unstable23_merge

Conflicts:
	hybrid/SalesforceHybridSDK/HybridPluginTestApp/Classes/AppDelegate.m
	shared/SalesforceSDKCore/SalesforceSDKCore.xcodeproj/project.pbxproj
	shared/SalesforceSDKCore/SalesforceSDKCore/Classes/SmartStore/SFSmartStore.m
Merge pull request #598 from khawkins/unstable23_merge

Mobile SDK: Merging unstable to unstable23