fixed issue to update user_stories for all users
Merge remote-tracking branch 'upstream/master'
1. add cleanup top_story 2. add timeline factor on user_stories
Merge pull request #25 from xiatao123/master

1. add cleanup top_story 2. add timeline factor on user_stories
Finished end to end for categorization. Also use "Stories" in URL and API instead of "Posts".
temporary disable normal RSS
add try catch block for iconv.
use buffer, test on heroku
test again
test another change.
Check back in regular RSS feed site.
Fixed email URL issue by decode URL.
ONly do server side sorting now.
Add code to handle 10 minutes interval
Fixed the problem fetch top stories based on sorting of user stories. TODO: make it run faster. Not utilize db query yet. Too many server array/hash manipulation.
Merge remote-tracking branch 'upstream/master'
fix a timeline bug
Merge pull request #27 from xiatao123/master

fix timeline issue and 10min interval
Profile the time spend on fetch stories. Optimize the call from 6000ms to 1300ms.
query user stories :  625 ms
find by user own top_stories!
map ids to BSON objectID :  676 ms
chop first num stories :  676 ms
query top stories :  1361 ms
modify each story :  1370 ms
sort story by score :  1370 ms
Total FindAll time spent :  1377 ms
Merge branch 'master' of https://github.com/frankyanwang/SmartRead