Import origin feed4j project.
Added 'DC'(http://purl.org/dc/elements/1.1/) Namespace in TypeRSS_2_0 class.
Appended 'copyright' attribute in FeedHeader class.
Appended 'pubDate', 'author', 'dc:creator' attributes in FeedItem class.
Added README
Updated README
Added 'isChinese' static method in HTMLEntities class.
added sources from remote repo
refactored project structure for merge