Modifying to get the default branch. Still remaining to reach the expected result.
Get documentup.json or . documentup.json for the default branch
This solutions allow us to take any file on the default branch
Because how to recover the ".documentup.json" or "documentup.json" has changed.

Fixed how to treat the config property as invalid.
New tests are created.
Modify the package.json to not installing redis 0.7.3 because:
https://github.com/mranney/node_redis/issues/285
Merge pull request #61 from iskigow/master

Issue #19 Default Branch?