Append index.html to directory urls.

[sciurius]

trafficstars

Automatically append index.html to directory urls.

[simonh1000]

Thanks.

Please add comments about the problem you are trying to solve, and what the test is that you are using here in the if statement

[simonh1000]

And add yourself to the list of contributors in the package.json

[sciurius]

Enhanced the test to try all of the conventional default documents and serve the first one found.