fixes #154 CalendarIntervalTrigger calculates wrong firing times
#147 add sample App.config configuration of db metadata
fixes #155 SelectSchedulerStateRecords does not filter with scheduler name
fixes #130 trigger completion signaling from AdoJobStore does not work properly when DisallowConcurrentExecution is set
fix typo and don't require IScheduler or QuartzScheduler to be IDisposable in point bug fix release
2.2.3 release preparations