Merge pull request #10 from madimalo/master

you can merge the encoding fix now.
Fixed the database close connection issue. Also Add category to tags. Better organize code for nested callbacks.
Fixed one bug when connect to mongohq.
changes after sync with frank
Merge branch 'master' of https://github.com/frankyanwang/SmartRead

Conflicts:
	data_store/config.js
	data_store/feedinsert.js
	server/db-provider.js
	server/db-settings.js