Basic example to build on for UART

Uses the serial communication library for arduino, initializes UART,
reads from the UNO's ADC and sets PWM output a well.
Reference for xbee
Added I2Cdev libraires

Added examples fro MPU6050 and others with I2C jrowberg/i2cdevlib
Added more Arduino examples for SD & Xbee

Added the SD Datalogger libraries from sparkfun and Xbee/Xbee Pro
libraries fro arduino from Google Code
Pressure sensor files

Added arduino examples for the BMP180 pressure sensor
Added more exmaples for a GPS & Xbee shield

In case we need them, added TinyGPS example and Xbee configuration
example for the use with the Xbee USB shield
Create README.md
About CanSat 2k14 CUCEI
Application Abstraction Layer
Added scheduller/RTOS examples and cores
Merge remote-tracking branch 'upstream/master'