Added Supporting the logic about Non-Presence mode.

Added Supporting the logic about Non-Presence mode.

- timeoutCB : will be recieved callback message  within SAFE_TIME(5sec)
- pollingCB : re-request 'get' to server and re-execute primitiveTimer that timeoutCB is registered.

Re-Aligned about functions and variables list in ".h" file.

Signed-off-by: doil.kwon <doil.kwon@samsung.com>
Change-Id: I4a60d455314d7488567ca218fe7cc6114b370796
Reviewed-on: https://gerrit.iotivity.org/gerrit/1437
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: JungYong KIM <jyong2.kim@samsung.com>
Reviewed-by: Uze Choi <uzchoi@samsung.com>