Added Voice Notifications and Explicit Filter for Identify Command

Hey Paddy

Great little plugin. Feel free not to merge this because it's kind of a bit silly and actually kind of pointless. But I thought I'd send a pull request that you can leave in your issues tab (if you want) for people to see this because while it's silly, it's also kinda neat. If they like it, they can fork it off me.

I was having issues with not getting notification sounds and would miss every mention of my nick. So I added "say" to the notifier_it function so now Victoria (my favorite little say voice) reads me messages so I don't miss them. I also noticed that the channel regex didn't seem to work (maybe it just doesn't load in time) for my autosendcmd for identify. I didn't want it notifying my password and very much didn't want Victoria speaking my password, so I put an explicit check for if it's this command and returned 0 if it is.

I don't really know perl, but I had fun on this. Thanks for making this available!

Kyle