|webapi| Update xml file and xwalk_common.sh for tct-widget02-w3c-tests

Signed-off-by: Xu, KangX <kangx.xu@intel.com>
[webapi] Add TCs for WebSpeech

Unit test platform: IVI
IVI test result summary: Pass 2, Fail 4, Block 3
Fail and block reason: Feature issue.
[doc] Update user guides per verification feedbacks

Special thanks to @tizen03 and @deyiliu for their
verification and feedbacks

Many thanks to @ibelem, @haoxli, @xiongjiehua, @BruceDai
for their update to the documents
Merge pull request #11 from zqzhang/zqzhang/user-guide

[doc] Update user guides per verification feedbacks
[webtestingservice] Upate webtestingservice for adding pack scripts.
Add TCs for Messaging
Update user guide a little more to reflect validation feedback
Merge pull request #13 from zqzhang/zqzhang/user-guide-2

Update user guide a little more to reflect validation feedback
Add html file
t[wrt] Update the tcs of splashscreen
[behavior] Update behavior suitability

-Rewrite the pass/fail storage using SessionStorage
-Use iframe to load tests, suit for Tizen, Android and IVI test

comments: 1.Sub test result can not show on page yet.
          2.Export function is not implemented yet.
[wrt] Add tcs to test app update
[wrt] Add 11 auto TCs to wrt-packagemgtauto-tizen-tests
Merge pull request #10 from jshentux/jshentux/webapi/webspeech

[webapi] Add TCs for test WebSpeech
Merge pull request #16 from jshentux/jshentux/behavior/update

[behavior] Update behavior suitability
Update user guide a little more to reflect validation feedback
[doc]Update Web_Testing_Service_User_Guide_v1.0 by adding how to pack wts-version.zip.
Merge pull request #9 from kangxXu/kangxXu/webapi/no-env

|webapi| Update xml file and xwalk_common.sh for tct-widget02-w3c-tests
Merge pull request #15 from JianfengXu/xujfx/webapi/messaging

Xujfx/webapi/messaging
Merge remote-tracking branch 'upstream/master' into wrt/android/app-version