[usecase-webapi] Update the description for usecase

- Update the description for usecase
[usecase-webapi] Improve Video for usecase

- Remove "For Tizen" and "For Android" in tests purpose
- PR-657 affect tests.tizen.xml and tests.android.xml, so update it again.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[webapi] Update lockOrientation-basic.html converted from Blink Layout Test

- Integrate license info into the test file after <!DOCTYPE html>
- Update the spec link to reflect latest Blink implementation
- Remove the author Intel as we are not the original author
- TODO: update the test logic after Crosswalk rebases to Chromium 38
  https://chromium.googlesource.com/chromium/blink/+/master/LayoutTests/screen_orientation/lockOrientation-basic.html
Merge pull request #759 from zqzhang/zqzhang/screen-orientation-blink

[webapi] Update lockOrientation-basic.html converted from Blink Layout Test
[wrt] update icon size from 117 to 128

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary:
 wrt-manifest-tizen-test:Pass 248, Fail 0, Blocked 0
 packagemgt/digitatlsign:pack to xpk install/uninstall/launch pass
Merge pull request #760 from linshen/shen/wrt/mainifest-117-128

[wrt] update icon size from 117 to 128
Merge pull request #713 from yunxliu/yunxliu/misc/spelling_mistake

[usecase-webapi] Update the description for usecase
Merge pull request #690 from xinliux/xinliux/usecase/video-update

[usecase-webapi] Improve Video for usecase
[wrt] Update test script to fix case bug in wrt-extension-android-tests
Merge pull request #761 from kangxu/kangxu/wrt/wrt-extension-android-tests/updateCase

[wrt] Update test script to fix case bug in wrt-extension-android-tests
[misc] Add a note that web worker doesn't support navigator language

There is an Intent to Implement in blink-dev mailing list:
navigator.language(),navigator.languages() and languagechange event for web workers.
[usecase-wrt]update check db to pkginfo --listpkg

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 2, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0
[wrt] Update json and steps with Crosswalk 8 standard
Merge pull request #750 from kangxu/kangxu/wrt/wrtcases/update

[wrt] Update json and steps with Crosswalk 8 standard
Merge pull request #763 from linshen/shen/misc/add-version

[usecase-wrt]update check db to pkginfo --listpkg
Merge pull request #764 from zqzhang/zqzhang/navigator-language-workers

[misc] Add a note that web worker doesn't support navigator language