Upgrade Doxygen configuration files for Doxygen 1.8.1, fix broken stylesheet and footer HTML, add explicit spacing into documentation code fragments to prevent Doxygen from removing empty lines in the output.

LUFA/Drivers/Misc/RingBuffer.h

@@ -65,23 +65,23 @@
  *      // Create the buffer structure and its underlying storage array
  *      RingBuffer_t Buffer;
  *      uint8_t      BufferData[128];
- *
+ *      
  *      // Initialize the buffer with the created storage array
  *      RingBuffer_InitBuffer(&Buffer, BufferData, sizeof(BufferData));
- *
+ *      
  *      // Insert some data into the buffer
  *      RingBuffer_Insert(Buffer, 'H');
  *      RingBuffer_Insert(Buffer, 'E');
  *      RingBuffer_Insert(Buffer, 'L');
  *      RingBuffer_Insert(Buffer, 'L');
  *      RingBuffer_Insert(Buffer, 'O');
- *
+ *      
  *      // Cache the number of stored bytes in the buffer
  *      uint16_t BufferCount = RingBuffer_GetCount(&Buffer);
- *
+ *      
  *      // Printer stored data length
  *      printf("Buffer Length: %d, Buffer Data: \r\n", BufferCount);
- *
+ *      
  *      // Print contents of the buffer one character at a time
  *      while (BufferCount--)
  *        putc(RingBuffer_Remove(&Buffer));