[communication] [Xbee_API] initial commit
[communication] [Xbee_API] Filles .h with lot of defines, typedef and co.
[communication] [Xbee_API] Adds functions, renames folder.  
* XbeeWriteFrame implemented
* XbeeReadFrame implemented
* XbeeWriteByteEscaped implemented
* XbeeReadByteEscaped implemented
[communication] [Xbee_API] Implements XbeeAtCmd and packs structures to match real bytes sennding.
[communication] [Xbee_API] Adds the include for linux drivers, performs some changes in types.
[communication] [Xbee_API] Moves some files and creates a test application.
[communication] [Xbee_API] moves and rename some files.
[communication] [Xbee_API] Implements new functions, modifies some parameters.  
* @Xbee_API_linux.c : switch to 2 stop bytes (better behavior at high baudrate), modifies display string.
* @Xbee_API.c : implements XbeeTX16, modifies vraiable use to match new types and optimize ressource usage.
* @Xbee_API.h : modifies some types (use of pointer vs array) for optimization purposes.
* modifies some aprameters in main.c and params.h
[communication] [Xbee_API] implements arduino drivers, modifies some prototypes for cross-platform compatibility.
[communication] [Xbee_api] Creates test project for Xbee API mode 2 on Arduino.
[communication] [Xbee_API] Adds more rubustness to endianness, creates two new functions, implements test application.
[communication] [Xbee_API] Corrects bugs and makes improvements.  
* @Xbee_API_linux_drivers.c : adds debug #ifdeg for raw hex print
* @Xbee_API.h : corrects member orders in spTX16Data, corrects one other type.
[communication] [Xbee_API] Modifies the test application.
[communication] [Xbee_API] Fixes some bug in XbeeTX16.
[communication] [Xbee_API] Modifies test application and correct bugs.
[communication] [Xbee_API] Enabels flow control on linux driver, modifies XbeeReadFrame return value.
[communication] [Xbee_API] Adds important notice
quentin@m:~$ [communication] [Xbee_API] Implements 3 projects for ping tests. 
* Xbee_API_arduino is the sender of pings.  
* Xbee_API_arduino_2 and Xbee_api_test are the repliers to these pings.
[communication] [Xbee_API] Modifies file hierachy to match our git's usage.
[communication] [Xbee_API] Implements ping test.