AutoProxy marked as public by AMO

On 21st this month, AutoProxy has been marked as public by AMO, which means:

1. we don't need to click a check box before installing AutoProxy;
2. updates will be provided through the update check service, manual update is no longer necessary.

Thanks the AMO editor: Andrew Williamson!

Note: If you were just upgraded from version 0.2.x, your default proxy setting will be reset to Tor. If you are not using Tor, please go to AutoProxy preference and choose another proxy. Sorry for inconvenient. :-)