Shiny Updates: Add ajax-y updates to the plugin list page, and ajax-y updates and installs to the plugin card page.

This also includes JS architecture that can be expanded to support theme, core and language pack updates.

Props pento, ericlewis, lgladdy, adamsilverstein, DrewAPicture

See #29820


Built from https://develop.svn.wordpress.org/trunk@31333


git-svn-id: http://core.svn.wordpress.org/trunk@31314 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/js/plugin-install.js

@@ -69,8 +69,4 @@ jQuery( document ).ready( function( $ ) {
 		$( '#section-holder div.section' ).hide(); // Hide 'em all.
 		$( '#section-' + tab ).show();
 	});
-
-	$( 'a.install-now' ).click( function() {
-		return confirm( plugininstallL10n.ays );
-	});
 });