initial commit
removed unused files
add gunicorn server
add models definition
add model variable in shell
FavArticle just save the site title
add ModelMixin
add urlparser
add necessary file
add remove unused tags before get rss link
add feed data fetcher
little fixed for urlparser
bugs fixed
add test in fetcher
add imports in models level
add delete_without_commit
add utilit methods for Site
fixed codec error
add base query class
fixed content fetch bugs