Growl 2.0.7

- updated all Growl claw icons to match new Mac icons
- made History item text copyable (select item and then Ctrl-C)
- created user-configurable setting for length of time to store
history items (HistoryDaysToStore in user.config)
- updated Websocket support to draft-ietf-hybi-thewebsocketprotocol-14
protocol version
- fixed an issue where thumbnail images for old history items were not
deleted from disk
- fixed issues with Standard display that caused issues with high DPI settings
- fixed a bug in Growl.Connector.dll that didnt handle newlines (\n)
in callback data properly