[webapi][XWALK-2572] Fix bug for mediaserver

- Fix bug for mediaserver
- Failure analysis: https://crosswalk-project.org/jira/browse/XWALK-1699

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
[webapi] Add developer guide for SIMD
[embedding][XWALK-2374] Add new cases for onCreateWindowRequested, onIconAvailable and onReceivedIcon

- Failure analysis: The onCreateWindowRequested method could not be triggered when new window was opened.

Impacted tests(approved): new 8, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 2, fail 6, block 0
[usecase-embedding][XWALK-2373] Add usecase for onIconAvailable, onReceivedIcon and onCreateWindowRequested

- Failure analysis:The onCreateWindowRequested method could not be triggered when new window was opened.

Impacted tests(approved): new 2, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 1, fail 1, block 0
[doc][embeddingapi] Add embedding User and Developer Guide

- Add Embedding_Testing_Suite_User_Guide.md
- Add Embedding_Test_Suite_Developer_Guide.md
- Add Embedding_Test_Suite_Packaging_Guide.md
[webapi][XWALK-2593] Fix bug for webrtc

- Fix bug for webrtc
- Failure analysis: https://crosswalk-project.org/jira/browse/XWALK-2593

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
[webapi-usecase] Remove 11 tests from usecase

- Remove 11 test cases from usecase, because of merge to demo express
[wrt]update multiuser tcs

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 9, deleted 1
Unit test platform: [tizen]
UT result: Pass 9, Fail 0,Block 0
Merge pull request #1049 from xinliux/xinliux/usecase/merge-to-express

[webapi-usecase] Remove 11 tests from usecase
Merge pull request #1031 from zhuyongyong/yongzhu/usecase-embeddingAPI-v10/Add

[usecase-embedding][XWALK-2373] Add usecases for onCreateWindowRequested, onReceivedIcon and so on
Merge pull request #1020 from zhuyongyong/yongzhu/embeddingAPI-v10/addcases

[embedding][XWALK-2374] Add new cases for onCreateWindowRequested and so on
[usecase-webapi][XWALK-1419] Add a usecase for Telephony

- Add a usecase for Telephony
- Failure analysis: Feature issue, successcallback of dial function cannot be invoked

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
Merge pull request #1017 from yunxliu/yunxliu/misc/telephony

[usecase-webapi][XWALK-1419] Add a usecase for Telephony
Merge pull request #1056 from linshen/shenlin/update-commandmanu-bywang

[wrt]update multiuser tcs
Merge pull request #953 from yunxliu/yunxliu/webapi/webrtc_xwalk2593

[webapi][XWALK-2593] Fix bug for webrtc
Merge pull request #961 from yunxliu/yunxliu/webapi/mediaserver_xwalk2572

[webapi][XWALK-2572] Fix bug for mediaserver
[webapi] Move these checkpoints to demo-express

- Move these checkpoints to demo-express
Merge pull request #979 from JianfengXu/xujf/simd/readme

[webapi] Add developer guide for SIMD
Merge pull request #960 from yunxliu/yunxliu/webapi/mediaserver

[webapi] Move these checkpoints to demo-express
Merge pull request #962 from zhuyongyong/yongzhu/embeddingapi-doc/md

[doc][embeddingapi] Add embedding User and Developer Guide