Fixed typo in field.rb
Optimizing sax_parser: moved _attach_object! default options to constant Object::ATTACH_OBJECT_DEFAULT_OPTIONS.
Optimizations to sax_parser.
Replaced SaxParser default ivar accessors with constants representing parser defaults.
Parser defaults & constant names are initially stored in PARSER_DEFAULTS.
These same constants can be set in Rfm module, before SaxParser module is loaded,
and SaxParser will use those instead. Note that some methods such as Rfm.backend,
Rfm.parser, Rfm.backend=, Rfm.parser=, Rfm.get_backend, etc.. have been removed.
Use the new constants or the Rfm configuration utility instead.
Replaced direct declaration of parser defaults in Rfm with hash of defaults Rfm::PARSER_DEFAULTS.
Rfm::SaxParser will expand this hash into individual constants/values.
Removed unnecessary Forwardable extension in SaxParser and SaxParser::Handler.
Updated rakefile & rspec to handle new parser-defaults scheme.
v3.0.5.pre01