updating readme to reflect what I did in the refactoring portion
spelling error
Merge branch 'master' into rss-reader-db

grabbing the changes to the readme in the refactor portion.
removed unnecessary require statments
removed code from homecontroller because I'm not using it.
added or for a blank author
forgot a quote
comment explaining what to do with duplicate posts
added url presence validation on posts and feeds
added tests on presence of url and added an after_create callback on feeds to ensure they ALWAYS have posts if they are available.