Link to functions and classes in the tutorial
Set content-type in dynamic-content and static-routing examples

Before this change the server response had a content-type of
application/octet-stream, this caused the browser to download the
page instead of showing it.
Use the same port as the other examples
Merge pull request #20 from fracek/quickstart

Some fixes to the quickstart tutorial
Lower a log level to debug to reduce info output.
Switch to a thread pool for servicing requests.

Use the concurrency library. Part of this work was done by
Ingo Albrecht (@promovicz).
Make the default logger quieter.

This is technically a broken change since it means that debug
output gets dropped. We should definitely improve this, but
right now, logging is also very slow.