* lib/rss/parser.rb: added entity handling type predicate.
* lib/rss/rexmlparser.rb: ditto.
* lib/rss/xmlparser.rb: ditto.
* lib/rss/xmlscanner.rb: ditto.

* lib/rss/xmlscanner.rb: more robust entity handling.

* test/rss/test_parser.rb: added an entity handling test.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10295 b2dd03c8-39d4-4d8f-98ff-823fe69b080e