Hook up with MongoLab and Meteor

Now the measurement data will be sent to bp hub after new measurement
uploaded to smart phone

(details)
MongoLab:
username: liaoliao, pwd:Tingting123
collection bp:
username: bp, pwd: bp

Rest API used to update db from app

how to run the web app:
$cd bphub
$MONGO_URL=mongodb://bp:bp@ds053877.mongolab.com:53877/bp meteor