Bug 885228 - modified css/html files in shared

Modified CSS/HTML files in shared direcotry & resized image to 1.5x if
exists in master with suffix '@2x'
Merge pull request #10720 from yurenju/bug885228-hd

Bug 885228 - modified css/html files in shared r=basiclines
Bug 881158 - hdpi/xhdpi resolution assets and layout for Video app
Bug 854759 - maintain the correct app size with keyboard when the
attention screen is hidden. r=Alive
Bug 840147 & Bug 877903 : fix orientation problem on open/close app animation.
                          * Open app by real device orientation
                          * Refactor setAppSize and rotateTransition to AppWindow
Bug 888841 - To use the specific value from device makefile for GAIA_DEV_PIXELS_PER_PX. r=timdream.
Merge pull request #10784 from marcofreda527/v1.1.0hd

Bug 888841 - To use the specific value from device makefile for GAIA_DEV_PIXELS_PER_PX. r=timdream
Merge pull request #10776 from huchengtw-moz/hd/Bug_881158_video

Bug 881158 - hdpi/xhdpi resolution assets and layout for Video app r=@rexboy
Bug 881150 - hdpi/xhdpi resolution assets and layout for Keyboard app.