TMobile (USA) Minutes Used version 0.5 and 0.6

I have updated the extension with major code clean-up and a few new features as follows. You can get it from Mozilla Update

• fixed TypeError: win.gTMobileMinutesUsed has no properties when accessing this extension's option from firefox's tools->extension menu.
• added http timeout configuration
• major code refactor with namespace
• added more TMobile sites with which the password is saved