[embeddingapi][XWALK-2425] Add 2 cases for onReceivedTitle when navigation back

- Failure analysis: When navigation back, the onReceivedTitle won't be triggered.

Impacted tests(approved): new 2, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 2, fail 1, block 0
[XWALK-2331] Add test case for media source API
[usecase-embeddingapi] Improve XWalkPrefere and multi views usecase

- Improve MultiSurfaceViewsActivity, MultiTextureViewsActivity and XWalkPrefere

Impacted tests(approved): new 0, update 3, delete 0
Unit test platform: [Android]
Unit test result summary: pass 3, fail 0, block 0
[webapi] Remove Vehicle info ZonePosition attributes and update VehicleInterface

- Since ZonePosition attributes not exist in Zone according to new spec, So reomve these attributes test
- availabilityChangedListener and removeAvailabilityChangedListener in tizen.vehicle.vehicleSpeed

Impacted TCs num(approved): New 5, Update 2, Delete 19
Unit test Platform: Tizen IVI
Tizen test result summary: Pass 4, Fail 25, Blocked 0
[doc]Add dev/user readme
Merge pull request #988 from linshen/shenlin/adddocreadme

[doc]Add WRT dev/user readme
Update pack.py to support string format home folder path.
[wrt-usecase] Update TCs for OpenFile

Impacted TCs num(approved): New 0, Update 2, Delete 0
Unit test Platform: Android
Android test result summary: Pass 2, Fail 0, Block 0
[wrt][xwalk-2298] Add controls to securitymanu app

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Android
Android test result summary: Pass 1, Fail 0, Block 0
[wrt-usecase] Update manifest files to new template

Impacted TCs num(approved): New 0, Update 11, Delete 0
Unit test Platform: Android
Android test result summary: Pass 11, Fail 0, Block 0
[webapi] Remove 3 tests for CSS3 Background due to spec update

- box-decoration-break has been removed from new spec
http://www.w3.org/TR/2014/WD-css3-background-20140204/

Impacted tests(approved): new 0, update 0, delete 3
Unit test platform: [Android][IVI]
Unit test result summary: pass 538, fail 0, block 0
[webapi]Change ref case type from manual to auto

Impacted tests(approved):new 0,update 102,delete 0
Unit test platform:[Android]
Unit test result summary:pass 67,fail 35,block 0
Merge pull request #974 from zhuyongyong/yongzhu/usecase-embeddingapi/improveInfo

[usecase-embeddingapi] Improve XWalkPrefere and multi views usecase
[usecase-webapi] Add README.md for webapi usecase
Merge pull request #993 from wanghongjuan/wanghongjuan/usecase/update-manifest

[wrt-usecase] Update manifest files to new template
Merge pull request #992 from wanghongjuan/wanghongjuan/wrt/xwalk-2298

[wrt][xwalk-2298] Add controls to securitymanu app
Merge pull request #991 from wanghongjuan/wanghongjuan/usecase/OpenFile

[wrt-usecase] Update TCs for OpenFile
[usecase-embeddingapi] Add README.md for embeddingAPI usecase

- Add embeddingapi-usecase-tests/src/org/xwalk/embedded/api/sample/READ.md
- Rename embeddingapi-usecase-tests/README to embeddingapi-usecase-tests/README.md
[webapi][XWALK-2533] Fix bug for mediarenderer

- Fix bug for mediarenderer

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 1, fail 0, block 0
[usecase-wrt]Change multiuser tcs to approved
[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 13, deleted 0
Unit test platform: [tizen]
Unit test result summary:Pass 13, Fail 0,Block 0