Minor documentation fixes - change \note entries to \warning where appropriate...

Minor documentation fixes - change \note entries to \warning where appropriate and remove/update old documentation.

Bootloaders/DFU/BootloaderDFU.txt

@@ -94,7 +94,7 @@
  *  Several user application functions for FLASH and other special memory area manipulations are exposed by the bootloader,
  *  allowing the user application to call into the bootloader at runtime to read and write FLASH data.
  *
- *  \note The APIs exposed by the DFU class bootloader are \b NOT compatible with the API exposed by the official Atmel DFU bootloader.
+ *  \warning The APIs exposed by the DFU class bootloader are \b NOT compatible with the API exposed by the official Atmel DFU bootloader.
  *
  *  By default, the bootloader API jump table is located 32 bytes from the end of the device's FLASH memory, and follows the
  *  following layout:

Demos/Host/Incomplete/BluetoothHost/Lib/SDPServices.h

@@ -76,7 +76,7 @@
 		/** Structure for the association of attribute ID values to an attribute value in FLASH. A table of these
 		 *  structures can then be built up for each supported UUID service within the device.
 		 *
-		 *  \note This table must be terminated with a \ref SERVICE_ATTRIBUTE_TABLE_TERMINATOR element.
+		 *  \attention This table must be terminated with a \ref SERVICE_ATTRIBUTE_TABLE_TERMINATOR element.
 		 */
 		typedef struct
 		{