- update doxygen documentation
- write a tutorial
- make bbtools use a common bbtools
  may be like busybox style [ongoing]

- use hcreate to improve symbol search and lookup

- add bb_memset command and API to reset [API is ok]
  BB data area without destroying BB

- add bb_publish and bb_synchro_xx to bbtools in order
  to be able script BB for demo and even practical
  application control

- add some direct scripting language binding
  (TCL, python, ...) as bbtools for 'shell'
