menu_clone 6.x-1.0-beta2

hook_help():
- added rel="external" for external links
- replaced 'Ignore line' with 'Ignore row' for consistancy

form theming + CSS:
- added styling for the ignore row to make it stand out more. Looks good on Rubik & Garland
- Ignore row text is now <strong> instead of <em>. Better this way.

Clone form:
- added proper divs and classes for the markup field in menu_clone_clone_form(), still need to see if we can use the forms API to render this in a more standard way.
- fixed a typo in the description field of the fieldset

General:
- code formatting cleanups
- added PHP req. to module .info file