Pluginmode for Flash plugins

[zach]

Flash plugins each need a way to know, "Is there a JS component that accompanies the Flash plugin?". Consider:

plugins: {
  "./exampleplugin1.swf": {},
  "exampleplugin2": {}
}

We'd still be using the jwembedder, but only exampleplugin2 would have a JavaScript counterpart. Thus, it's inaccurate to simply specify the embed method as proxy for answering the above question. We'll need a property that the JW embedder will set for each plugin that has a JS counterpart rather than a single player property that is simply copied into every config.

I suggest we call it pluginmode. It will be set by the embedder, but only for flash plugins to HYBRID or FLASH.

[zach]

Fixed in 1629