adding overloaded output operator for EventEnum

Change-Id: Ica054c6d5ce010197d7ba2287d284b52b2964dcb
Merge branch 'SIMPLEITK-430_PrintIterpolatorsAsStrings' into SIMPLEITK-454_AddEventCallbacks

Conflicts:
	Code/Common/src/CMakeLists.txt

Change-Id: I8133e9aee68c443da34cece36fbff53e3c1258a9
Updating ITK superbuild towards ITK 4.5.1

This patch contains important fixed for the AbortEvent.

fecdd17 COMP: Update libminc to latest version.
9d6e325 BUG: Adding export specification to Exception objects
d7b9a0a Merge branch 'simpleitk-related' into release
6c23e1d COMP: SimpleITK linkage failure
02468a3 BUG: Correctly re-throw exception to restore AbortEvent, ProcessAborted

Change-Id: I3702cb2f03a56b255d84ca00f7f87fd88aa33007
Merge topic 'SIMPLEITK-467_UpdateITKSuperbuildTowards4.5.1' into next

d9793b44 Updating ITK superbuild towards ITK 4.5.1
9fb0e16c Merge branch 'SIMPLEITK-430_PrintIterpolatorsAsStrings' into SIMPLEITK-454_AddEventCallbacks
6ffed308 adding overloaded output operator for EventEnum