* ext/psych/lib/psych.rb: update psych version.
* ext/psych/psych.gemspec: generate new gemspec for new version.
* ext/psych/lib/psych.rb: calling `yaml` rather than `to_yaml`.
* ext/psych/lib/psych/nodes/node.rb: Rename `to_yaml` to just `yaml`
in order to avoid YAML::ENGINE switching from replacing this method.
* test/psych/helper.rb: fix tests for method name change.
* test/psych/test_document.rb: ditto
* test/psych/visitors/test_emitter.rb: ditto
* ext/psych/lib/psych/scalar_scanner.rb: Match values against the
floating point spec defined in YAML to avoid erronious parses.
* test/psych/test_numeric.rb: corresponding test.
* ext/psych/lib/psych/visitors/to_ruby.rb: ToRuby visitor can be
constructed with a ScalarScanner.
* ext/psych/lib/psych/visitors/yaml_tree.rb: ScalarScanner can be
passed to the YAMLTree visitor.
* ext/psych/lib/psych/visitors/to_ruby.rb: Define Regexp::NOENCODING
for 1.9.2 backwards compatibility.
* ext/psych/lib/psych/visitors/yaml_tree.rb: Fix Date string
generation for 1.9.2 backwards compatibility.
* ext/psych/lib/psych/visitors/yaml_tree.rb: emit strings tagged as
ascii-8bit as binary in YAML.
* test/psych/test_string.rb: corresponding test.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34017 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
