Purpose of the default "Spark!" message

[mholt]

First, great little program. Thanks for making it!

I had a question about running spark without any flags or arguments. It shows a message that says "Spark!" -- is this useful? What is its purpose?

If it isn't being used, I'd propose that the default behavior be equivalent to spark . - i.e. serve static files from the pwd.

[rif]

What can I say, you are so right. Updated the code.