Added basic driver example use code to the library documentation.

Made the USARTStream global public and documented in the SerialStream module, allowing for the serial USART stream to be accessed via its handle rather than via the implicit stdout and stdin streams.

LUFA/Drivers/Board/Temperature.h

@@ -47,6 +47,16 @@
  *  current temperature in degrees C. It is designed for and will only work with the temperature sensor located on the
  *  official Atmel USB AVR boards, as each sensor has different characteristics.
  *
+ *  <b>Example Usage:</b>
+ *  \code
+ *      // Initialise the ADC and board temperature sensor drivers before first use
+ *      ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
+ *      Temperature_Init();
+ *
+ *      // Display converted temperature in degrees Celcius
+ *      printf("Current Temperature: %d Degrees\r\n", Temperature_GetTemperature());
+ *  \endcode
+ * 
  *  @{
  */
 
@@ -110,8 +120,7 @@
 	/* Private Interface - For use in library only: */
 	#if !defined(__DOXYGEN__)
 		/* Macros: */
-			#define TEMP_TABLE_SIZE   (sizeof(Temperature_Lookup) / sizeof(Temperature_Lookup[0]))
-			#define TEMP_TABLE_OFFSET -21
+			#define TEMP_TABLE_OFFSET_DEGREES   -21
 	#endif
 
 	/* Disable C linkage for C++ Compilers: */