Merge branch 'devel/tizen_3.0' into tizen

* devel/tizen_3.0:
  Modified item definition format
  Version 0.9.3
  sensor: update app uninstall event dbus signal
  sensor: try to record one tuple per one minute to reduce the pedometer DB table size
  sensor: re-sample pressure data and perform lazy insertions to reduce DB overhead
  sensor: align recording request json format with sensor api
  sensor: cascade its recording requests if an app is uninstalled
  sensor: set the maximum retention period (1 month)
  sensor: remove necessity of dynamic_cast in SleepLogger
  sensor: add the sensor recorder for sleep monitor
  sensor: define sleep monitor & hrm record table names
  sensor: rename SensorProxy::start() and stop() to listen() and unlisten()
  sensor: change SensorProxy::isRunning() to a public member
  sensor: split the time-related functions into TimeUtil class
  sensor: reorganize the folder structure

Change-Id: Ifb8a525437899c6abae2ef061a14ea715249f7e7
Signed-off-by: Mu-Woong Lee <muwoong.lee@samsung.com>