Renamed RecurrenceAnalyser to RecurrenceFinder.
Introduced SingleDailyRecurrenceFinder and started with the implementation.
Improved the recurrence matcher builder DSL.
EventSamplesUtils: introduced a utility function that calculates the average time of the day of a series of event samples.
Merge remote-tracking branch 'origin/master'

Conflicts:
	chronyLib/src/test/java/si/urbas/chrony/recurrence/analysis/SingleDailyRecurrenceFinderTest.java