Place notification of running server in callback

`server.listen` is an asynchronous operation, and so the `console.log` may fire before the server is actually running. No longer.
Adding the postHeader.html template handler

Adding by default to show titles as links to posts in index.
Merge pull request #6 from maxbucknell/master

Place notification of running server in callback
Merge pull request #7 from marcovega/patch-1

Adding the postHeader.html template handler
fix invalid function overloading thanks to issue #13 by nonsensery.
Merge remote-tracking branch 'upstream/master'
redesign