Sign On Manager tested

Hi Sriram,

Here are quick updates on the Sign On Manager.

- The persistance manager has changed and is now simpler
- The experiment of programming with grease monkey seems to work well. I used the simulator with Firebug debugging capabilities to the maximum
- I have seen the script working with, digg, slashdot and yahoo mail

Things that I would be working on

1. Usability and better Console
- Make the console dragable and minimizable
- Should be able to cancel auto submit for certain pages
2. Change the FormFiller code to neglect fields that are not found