Property modernization w/ Gaudi v28 (EventSelectorAthenaPool-00-20-00)

	* updates for Property modernization. see gaudi/Gaudi!182
	* requires Gaudi v28
	* tag EventSelectorAthenaPool-00-20-00

M       src/EventSelectorAthenaPool.h

2016-12-08 Peter van Gemmeren  <gemmeren@anl.gov>
	* Make EventSelectorAthenaPool call preNext() and postNext() const to
	  deal with Gaudi changes (from -18)
	* Tagging EventSelectorAthenaPool-00-19-19

2016-11-11  Charles Leggett
	* FIXME: hackish updates for const ToolHandle enforcement
	* tag EventSelectorAthenaPool-00-19-18

M       src/EventSelectorAthenaPool.h
M       src/EventSelectorAthenaPool.cxx

2016-08-26  scott snyder  <snyder@bnl.gov>

...
(Long ChangeLog diff - truncated)