Property modernization w/ Gaudi v28 (GaudiSequencer-00-04-00)

	* updates for Property modernization. see gaudi/Gaudi!182
	* requires Gaudi v28
	* made Property types explicit, eg IntegerProperty -> Gaudi::Property<int>
	* Property with verifiers are now Gaudi::CheckedProperty<TYPE>
	* tag GaudiSequencer-00-04-00

M       src/AthPrescaler.h
M       src/AthEventCounter.h
M       src/AthSequencer.cxx
M       src/AthSequencer.h

2016-07-28  Charles Leggett
	 * endreq -> endmsg
	 * tag GaudiSequencer-00-03-25

M       src/AthSequencer.cxx
M       src/AthPrescaler.cxx