change rss sites design
activerecord support
change sites table scheme
add feeds table
get feed url in db
implement method deleting site in db
implement method adding site in db
remove unnecessary comment
remove debug line
remove debug method
add uniqueness to url field in Sites table
remove unnecessary method
define model class 'Site'
require model class
add composit relation between Feed and Site
repair conflict
change site design
add new field 'lastBuildDate' in Sites