Issue #216 : add a new API to save multiple events
Issue #216 : add new APIs inside UILocalNotification category and add place-holder unit tests
Issue #216 : add a new API to generate next dates to schedule, not fully implemented for all kinds of experiment yet, so keep the warning of “control may reach end of non-void function”
Issue #216 : add new API for notification manager and add place-holder unit tests
Issue #216 : finish startSchedulingForExperiment, add place-holder unit tests