update package.json

introduce socket.io
Merge pull request #1 from xujihui1985/master

update from original repo
Merge branch 'master' of github.com:scotv/Transformers
extract the manipulation of mongo collection into a helper function

extract to function named `mongoHelper`
rewrite `dealing.getAll()`
add `saveItem()` to dealing controller

rename extracted mongo helper in dealing controller
add routing to receive save post
apply `mongoHandler` on `dealing.getById`
Merge pull request #3 from scotv/master

merge request for package.json and dealing controller