Wrap chdir calls, small spec fix

[pete]

Thanks for this gem. I've made a small patch:

There are two commits:

• The lib for Forgery is apparently 'forgery'; I changed a require in the spec helper. I don't know if you're on a case-insensitive FS, or perhaps a previous version of Forgery used the capitalized filename.
• I wrapped calls to Dir.chdir. It's not any more thread-safe than it was before, but it does ensure that, by the time the call is finished, we'll be back in the previous directory. (I'm going to try using this on a web service, and the application may get frustrated if the cwd moves around.)

[wingrunr21]

Thanks for the fix. Yes, I'm in OS X so that's case insensitive. I'll pull it in a few days when I get a chance to turn my attention back to this gem.

[pete]

Thanks!

[pete]

I may be forking gitolite shortly and so have renamed my repo to gitolite-gem ; I seem to recall this causing problems for github in the past, so let me know if I've broken anything. Again, thanks!