Does not work with a new repository

[ryanvarick]

I think the latest version does not work with new repositories (existing repos work fine).

1. Clone locally
2. Create and git init new document repository
3. Update config.yaml
4. Start Jingo
5. Visit localhost:6067

Results in a runtime error:

/path/to/jingo/lib/gitmech.js:288
      callback(null, data.toString().split("\n"));
                         ^
TypeError: Cannot read property 'toString' of undefined
...

Looks like the hashes function blows up when there's no repo history.

[claudioc]

Oh, that's unfortunate. Sorry, I will fix it right now

[claudioc]

Closed and released with 1.6.1.

Thank you very much for reporting. I am going to write a test to avoid more embarassing failures like this one in the future.