inputButtonPressed default actions should be optional

```
-(void)inputButtonPressed
{
    if ([delegate respondsToSelector:@selector(inputButtonPressed:)]) 
    {
        [delegate inputButtonPressed:self.textView.text];
    }

    /* Remove the keyboard and clear the text */
    [self.textView resignFirstResponder]; // should be optional
    [self.textView clearText]; // should be optional
}
```
