Break me off a piece of that Megazeux debugger

Breaking news: breakpoints now exist in the debugger. There’s no indication that they exist until execution reaches them unless you look in the console window , but they’re there! Next up: differentiating between active line, current line, and line + breakpoint in the robot editor syntax highlighting. Apart from that, the debugger is now fairly functional – stepping, continuing, and breaking, and most importantly quitting are all zipping along as happy as can be.