change Feed's _id from ObjectId to feed url.
move post wriatble stream to Post's static method.
debug
revise feed-request
change default values of post to not crawl on creation
upsert feed on POST /feeds
correct merge miss
change component install step from postinstall to prepublish.
render posts on feed created
give up on feed search error
Merge pull request #26 from tazima/topic-new-feed

Remove redundancy on post creation.