Added a "Delete Script" button on the options page

- Added a "Delete Script" button on the options page.
- Removed the fake ".js" extension that were added when saving a new
script.
Improved the "autopoke.js" example

- Added a "POKE" button on the Facebook Pokes page to
activate/deactivate the auto-poking.
- Added a log of the sent pokes with time and names.