Find way to support long flags on systems that don't have GNU getopt installed.

```
I love this tool and am using it enthusiastically. however, i am having a 
problem in that I have a lot of flags with long names and they don't abbreviate 
well. Are short flags required? Are there any workarounds that would extend the 
number of short flags available?

```

Original issue reported on code.google.com by `zimzaz.wfz` on 10 Nov 2011 at 10:01
