|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.
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
[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.
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
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