The project file structure was modified and the button and field were added to main view in SPViewController.

> The DLog was added to console print during debug process.
The animate block was added when touch up inside the button.
The textFieldShouldReturn: protocolo selector from UITextFieldDelegate was added for removing the views with animation when you touch done keyboard button.
TextLabel was added and its content was updated with the textField content.

> The simplest fade animation was added to this view.
Merge branch 'interface'