[Bluetooth] stopDiscovery API fix to be compliant with TCT tests

stopDiscovery API is supposed to cancel an active discovery session.
If user cancels the discovery while there is no active discovery,
we should NOT return an error to pass TCT tests.
[Alarm] Initialize the "period" to null if its value is not set.
This can ensure the "period" be enumerable.
BUG=XWALK-2079
Merge pull request #350 from yejingfu/alarm-fix

[Alarm] Initialize the "period" to null if its value is not set.
Revert "[Tizen] Move MediaServer dbus objects to worker thread"

This reverts commit 366c5b79b1c1de0efec3b2c6a27f255b96834f9b.

BUG=XWALK-2009
Merge pull request #349 from eurogiciel-oss/stopDiscovery_noerror

[Bluetooth] stopDiscovery API fix to be compliant with TCT tests
Bump version to 0.80
Implementation of Tizen SSO APIs
Merge pull request #335 from izaman/master

Implementation of Tizen SSO APIs
Add initial support for MediaRenderer API.
BUG=XWALK-1195
Merge pull request #348 from sragavan/mediaserver-api

Add initial support for MediaRenderer API.
Merge pull request #351 from alexshalamov/remove_dlna_worker_thread

Revert "[Tizen] Move MediaServer dbus objects to worker thread"
Bump version to 0.81
[Alarm] Initialize the "id" to null in constructor
The alarm id becomes valid only when it's added into tizen system.
Before that we should ensure the property is enumerable.
Set the configurable to true because we can re-define the property later in sub class when it's added into tizen system.

BUG=XWALK-2127
[Bluetooth] remove glib mainloop thread

Following XWALK-1331 bug resolution which consists of reintroducing
a glib mainloop running in Extesion Process. As a consequence, there
is no need to make run a glib mainloop in separate crosswalk extensions.
Merge pull request #355 from eurogiciel-oss/remove_glib_mainloop

[Bluetooth] remove glib mainloop thread
Bump version to 0.82
Merge pull request #354 from yejingfu/topic-alarm

[Alarm] Initialize the "id" to null in constructor
[Tizen] Implement W3C NFC API

This patch adds initial implementation of W3C NFC API for Tizen platform.
API specification can be found here: http://www.w3.org/TR/nfc/

BUG=XWALK-432