Switching unit tests to XCUnit
Merge pull request #730 from khawkins/sdk_core_xcunit

Switching SalesforceSDKCore unit tests to XCUnit
Adding CordovaLib as a dependency to the hybrid test app
Merge pull request #731 from khawkins/update_hybrid_test_scheme

Adding CordovaLib as a dependency to the hybrid test app
In progress: Adding SalesforceSDKManager
In progress: more SDK manager
Minor changes
Adding some validation, errors
Adding workflow
Adding auth, user account delegate functionality
Updating RestAPIExplorer's AppDelegate to consume SalesforceSDKManager
Interim checkin: app foregrounding
Implementation of foregrounding