@heff removed playerOptions from plugin options because it created an inconsistency in plugin inits. closes #2532

- Fixed a console error in dom tests from loading a track source
- Switched to non-fetching poster urls in tests to prevent errors
- Stubbed XHR for TextTrack tests to prevent log errors
- Fixed text track console errors that stubbing async didn't catch
    because there's some async happening in tracks that makes it so
- XHR isn't even used until the test is complete
- Removed extra code
- Added player.dispose more places and fixed attributes test

@dmlap @gkatsev improve Flash tech error property and add an error setter to the base tech. closes #2517

closes #2497

@gkatsev fixed nativeControlsForTouch handling. Defaults to native controls on iphone and native android browsers.. closes #2499