Placeholder for activity that is being started when no sessions are present in the database.
Added linear layout placeholder - i.e. to place statistics of events over the time.
Added null check in onCreate for the 'no sessinos' case.
Fixed an issue with time difference calculation
Added pre-defined static values for ID and Name of touchable abstraction of 'END' event.
Adding 'END' touchable to the list of pre-defined touchables with ID value of 1000.
Storing 'END' event to the database
Initial draft of activity state saving for orientation changes
Fixed an issue with button enable/disable status and timer count continuation after orientation change