temperature, humidity, pressure sensor USB stick

The library publishes the data onto a zmq pub bus and its sent out to various interested parties (storage, live plotting etc)

##STATUS: Works on x86 w/o a problem for all message types and intputs/outputs. Currently some problems on arm:

• cant build bson message type
• extremely limited compile time resources: long compilation time and poor logging configuration

##TODO:

• make code safe and 'deploy' it
• write some tests and docs
• lots of error checking!

##DEPLOY:

• always running on rpi
• rotating data removal on rpi
• shipping to server/mongo db
• script to recover data on rpi in case server is down
• should always be running on server
• change device name on rpi

##Extensions:

• make python subscriber
• build website
• make auto-config more or config from web page
• add more modules