guard/guard — pull request #273 by oreoshake (2012-04-09 23:46:40+00:00)
Title: Fixes naming error, makes generation of vendored gems idempotent

Was running into this error when using guard programmatically:

```
/usr/local/rvm/gems/ree-1.8.7-2011.12/gems/guard-1.0.0/lib/guard/interactor.rb:85: command not found: /usr/local/rvm/gems/ree-1.8.7-2011.12/gems/guard-1.0.0/bin/fsevent_watch_guard
```

The file in ./bin is named fsevent_watch_guard_guard and running rake build_vendor would modify ext/extconf and other files by continuously appending/prepending values. I also regenerated fsevent_watch_guard by running rake build_mac_exec but there weren't any changes.