Add Notification Center support for OS X 10.9.

Hi, I add Notification Center support for OS X 10.9, but i don't install Growl latest version, so i commit "notify with name theType title theTitle application name applicationName description theDescription callback URL theURL".

What do you think ?

    to notify(theTitle, theDescription, theType, theURL)
	if system version of (system info) ≥ "10.9" then
		display notification with title theTitle subtitle theDescription
	else
		tell application "System Events"
			set isRunning to (count of (every process whose bundle identifier is "com.Growl.GrowlHelperApp")) > 0
		end tell
		if isRunning then
			tell application "GrowlHelperApp.app"
				«event register» given «class appl»:applicationName, «class anot»:allNotifications, «class dnot»:defaultNotifications, «class iapp»:iconApplication
				if length of theURL is 0 then
					«event notifygr» given «class name»:theType, «class titl»:theTitle, «class appl»:applicationName, «class desc»:theDescription
				else
					--notify with name theType title theTitle application name applicationName description theDescription callback URL theURL
				end if
			end tell
		end if
	end if
    end notify