[webapi] Add manual extension for tct-workers-w3c-tests
[webapi] Add manual extension for fileapi
Add manual extension for webapi-deviceadaptation-css3-tests
[sanity] Fix the issue of SessionHistory

The "Info" button on footer bar will popup a dialog to show the tips. But this dialog will change the sessionhistory default. So I remove this dialog, and add the tips to the page directly.
[webapi] Add manual extension for tct-ui-css3-tests
[webapi] Modify the AudioContext construction for WebAudio
[webapi] Add manual extension for webstorage
[webapi] Add manual extension for tct-animationtiming-w3c-tests

Update 7 cases.
[webapi] Add manual extension for tct-text-css3-tests
[webapi] Add manual extension for webapi-runtime-xwalk-tests

Update 3 cases.
[misc-sanity] Improve Viewport to avoid iframe limit
[webapi] Add manual extension for tct-colors-css3-tests

Update 29 cases.
Merge pull request #108 from JianfengXu/xujf/webapi/webaudio

[webapi] Modify the AudioContext construction for WebAudio
Merge pull request #106 from jshentux/jshentux/misc/sanity-sessionhistory

[misc-sanity] Fix the issue of SessionHistory
[webapi] Add manual extension for tct-backgrounds-css3-tests

Update 74 cases.
Merge pull request #117 from haoxli/haoxli/misc-sanity/viewport

[misc-sanity] Improve Viewport to avoid iframe limit
[webapi] Add manual extension to tct-extra-html5-tests
remove manual suffix of reference test
Merge pull request #104 from kangxu/kangxu/webapi/workers/manual

[webapi] Add manual extension for tct-workers-w3c-tests
Merge pull request #105 from wanghongjuan/wanghongjuan/webapi/cssdeviceadaptation

[webapi] Add manual extension for webapi-deviceadaptation-css3-tests