merge revision(s) 44809,44811,44813,44815,44816,44817,44818,44918,45003: [Backport #9482]

	* ext/psych/yaml/emitter.c: merge libyaml 0.1.5

	* ext/psych/yaml/loader.c: ditto

	* ext/psych/yaml/parser.c: ditto

	* ext/psych/yaml/reader.c: ditto

	* ext/psych/yaml/scanner.c: ditto

	* ext/psych/yaml/writer.c: ditto

	* ext/psych/yaml/yaml_private.h: ditto

	* ext/psych/lib/psych.rb: New release of psych.

	* ext/psych/psych.gemspec: ditto


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45160 b2dd03c8-39d4-4d8f-98ff-823fe69b080e