Update elements/logic.php

1. Added four new module positions: top-left, top-right - above columns, bottom-right, bottom-left - below columns with double width example:
______
|top-left|
-----------
|col1 ; col2 |
_________
|bottom-left|
----------------

2. Added character sets for google fonts.

3. Added logo options: logo as image, logo as text, logo as menu item (like in codesnipper.pl)

4. Added logo tagline