yui/yui3 #601 issue
#601 - fix content replacement
#601 - replace Y.each with Y.Array.each
#601 - make the better search of existing buttons container at _getButtonContainer
#601 - replace  with
#601 - Create unit tests for nested widget rendering inside renderUI
#601 - Create unit test for getStdModNode inside renderUI
merge https://github.com/yui/yui3/pull/602
rebuild after merge
change tests cause of deleting of yql module; rebuild