CHANGELOG for version 0.9

Bug Fixes:

- Stop shell from destroying the config instance

Changes:

- Change context: kamaki-image-addproperty --> kamaki-image-compute-property
- http logger names: clients.recv/send --> kamaki.clients.recv/send
- Move logger creation and control (except of the actuall logging) to cli

Features:

- A logger module container a set of basic loging method for kamaki [#3668]
   set/get_log_filename, add_file/strean_logger, get_logger
- Implement logger.activate/deactivate for loggers [#3715]