Fix opening files with symbolic links

[stepheneb]

This fixes issue 5: https://github.com/protocool/AckMate/issues/5 -- but in an ugly manner.

I asked for advice a while ago on the textmate list but didn't get any suggestions about how to make it cleaner.

http://lists.macromates.com/textmate/2010-September/031412.html

There are two commits in this pull request. The first makes it easier to debug Ackmate while doing development. The second fixes the problem with symbolic links.