ParseTree doesn't work with ruby 1.9.2

[mlanett]

ParseTree doesn't work with ruby 1.9.2
but nitpick uses ParseTree.

[kevinclark]

This is true! I'd toyed with an early implementation using Ruby Parser, but it limited the scan to files passed to the executable (it couldn't follow libraries). It probably wouldn't be tough to put back in. Instead of handling discovery through method_added, you could pass classes/methods/files in to the command line (like we did with Heckle) and you could run scans there. I don't think any of the scanning code would actually need to change - probably just what's in bin/. Maaaaybe tweaks to AST handling if Ruby 1.9 changes the nodes format, but I thought it was close. Want to give it a shot? I'm happy to assist, but don't really have time to hack on it at the moment.