cleaned up source tree
added support for XBee
created draft sensor project setup
added generated files to gitignore
added support for ADC access
redesigned xbee_transmit interface
cleaned up naming of bit manipulating macros
added support for reading temperature sensor
life is live ... tada da dada
added support for reading voltage of power source
TODO: remove warning
removed floating point support from build
added support for putting the XBee to sleep
added sleep and wakeup procedures (XBee, sensors)
changed order of readings to : VCC, Temperature
added small sleep for band gap to rise
added frame interpretation + timestamp
added light sensor as input
moved delay after transmit to xbee_transmit
found working solution for reading VCC
added support for sleeping power-down-style
implemented sleep_ms