fix for capturing & firing CeciElementAdded

1. Removed observer from ceci-card-base, since ceci-element-base's enteredView can do the same.
2. Removed duplicate dispatch of CeciElementAdded in component-tray after adding a component.
3. console.log cleanup.
Merge pull request #725 from secretrobotron/develop

fix for capturing & firing CeciElementAdded