Removed tight coupling between EMSMainViewController and EMSDetailViewController.
- Moved session title etc into a table view cell instead of the tableview header. This avoids the hack used to resize header on changes to text sizes.
- Listen for changes to favorite status of session. This decouples previously tight coupled code.
- Set the «hide toolbar on push» property of detail view and removed manual handling of toolbar.
Made speaker thumbnail larger and a round.