The main difference (now) between both versions is that I also included the announce of dispels (like shiving an enrage as a rogue). But that's it.
Command line usage is:
/int toggle - Enable/disable the addon
/int self - Display interrupt messages only to yourself
/int say or party or raid - Messages to the according channel
/int auto - Display message to self if alone, to party if in party or to raid if in a raid