Add an option to disable the capture of Log.trace in the console

Hi,

I don't know if I'm the only one, but I really don't like that HaxePunk is capturing calls to trace(); I prefer to have an external output where I can search, copy, and read when the game is closed. So every time I create a new project I add HaxePunk to the source and remove the line capturing traces. 
Well, I added an option to change this behavior and hopefully you'll accept it. If you have remarks, let me now and I'll make some changes.