Protect addSymLink against failed base cast. (StoreGate-03-06-43)

2016-05-16  scott snyder  <snyder@bnl.gov>
	* Tagging StoreGate-03-06-43.
	* src/SGImplSvc.cxx (addSymLink): Protect against failed base
	cast.

2016-05-12  Stewart Martin-Haugh  <smh@ern.ch>
	* Tagging StoreGate-03-06-42.
	* Remove HAVE_NEW_IOSTREAMS, originally there for gcc 2.95

2016-05-05  scott snyder  <snyder@bnl.gov>

	* Tagging StoreGate-03-06-41.
	* Enfore that initialize() gets called on VarHandleKey objects.

2016-04-29  scott snyder  <snyder@bnl.gov>

	* Tagging StoreGate-03-06-40.
	* cmt/requirements: Fix hive test.

2016-04-26  Charles Leggett
...
(Long ChangeLog diff - truncated)