Added functions for digital output and PWM output.
Added function for reading digital input.
Added command for reading analog input.
Added readme, minor improvements in comments.
Added support for 1-Wire temperature sensors.
Compatible with all Arduino boards.
Commands and functions separated into individual files.
Function for reporting an error.
Added support for reading data from MPL1152A barometer over I2C bus (command 'B').
Added support for the DS1844 digital potentiometer.
Support for barometer disabled, T command freezes the Arduino UNO, possible stack overflow.
Fixed error in reading 12-bit temperature from 1-Wire DS18S20.
Verbose messages shortened to save memory (solves the stack overflow problem).
Barometer re-enabled.
Added command "C" for initiating/checking communication.
Added REXduino master - REX project example. Temporary commit.
REXduino master - work continues...
Useful functions for checking pin modes, TBD.
Still working on REXduino master...
Added command for reading analog input (command was lost when moving the commands to a separate file).
Added mode N to switch the pin to "not connected" mode
Merge branch 'master' into REXmask

Conflicts:
	REXduino_commands.ino
beta version, works with Arduino UNO
Added switch mode commands for PWM and analog input (no action required, added only for confirmation purposes)