A couple improvements Aliases and Text to Speech

Hi guys, I've been using retaliation and love it! there are 2 things that I noticed were lacking. 

1) In my team we commit code using different ID's(sometimes we use our personal github etc) and I think using an alias dictionary makes sense. 

2) I plugged a speaker to the RaspberryPi so every time someone breaks the build we all hear! This is done using a very simplistic bash script using Google's text to speech API.

Thanks!

Luis.