Fixes uiConf vars missing from mwEmbedLoader.php output

* Adds qunit test for leadWithHTML5 flag with new uiVar based player
setting said configuration flag.
added new lang key mwe-timedtext-no-subtitles
renamed updatePosterSrc to updatePoster, updated poster alt text
fixed menu tabIndex for large menus
Merge branch 'jsonConfig' of https://github.com/kaltura/mwEmbed into jsonConfig
migrate capture thumbnail plugin to kBaseComponent
moved status left
restore playlist thumbnail images
Merge pull request #470 from kaltura/HTML5playerSelectionTestFix

Fixes uiConf vars missing from mwEmbedLoader.php output
added jQuery.naturalSize plugin
fixed thumbnail position on IE8
Better support for IE8
Fixed chromeless test page & QUnit
remove the need for divider attribute
added topBar container plugin
removed old title plugin, added title label plugin
added styling to topBarContainer
added display importance property
Added PIE - CSS3 for old IE!!!
add display Importance as css classs