Migrate the timers that manage creating timeupdate and progress events when the tech doesn't support them natively. Now, techs that extend MediaTechController will continue to automatically pick up synthetic playback and buffering events but they're scoped much more closely to the entity that needs them. In addition, time and progress tracking have been moved much earlier into the component initialization which fixes#1414.
The flash tech doesn't need to hold onto a reference to the placeholder element after the embed code has been generated. Set this.el_ to the embed code immediately instead of using another property to track it during init. Tested in IE8.
If dispose() was called before the SWF triggered onReady(), the placeholder div would be cleaned up but the actual object element would be left behind to mess things up in the future. Keep track of the object element during initialization and make sure it is removed if flash is unloaded early.
Instead of caching the last seek time at the player level, cache it in the Flash tech. The only place this value was used was in the progress controls when Flash was loaded, so this simplifies the logic in that component and pushes the hack down into a single location at least.
