Rename hook_elements() to hook_element_info()

Makes sense, and should be good to go if bot comes back green.

My only nitpick is that the variable name $type looks odd in:

function text_element_info() {
  $type['text_textfield'] = array(
    '#input' => TRUE,    
    // ..
  );
  $type['text_textarea'] = array(
    '#input' => TRUE,
    // ..
  );
  $type['text_textarea_with_summary'] = array(
    '#input' => TRUE,
    // ..
  );
  return $type;
}

Why not $elements ? or $types (plural) ? or simply $return ?

"We use $type everywhere related to element types currently".
I'm fine with that, but the returned array should be named $types (plural), then ?

Committed to CVS HEAD. Thanks!

Added to update page.