Implemented a fairly basic Config class

Internally just uses java.util.Properties, this simply has some
static keys. Allows me to require certain keys (and shut down the
server before doing anything if they are missing), check if they're
integers, etc. Also added a simple test case to check the sample.config.
dbconnect currently is a dummy field which will eventually be used for
the database connect info.

Signed-off-by: Toon Schoenmakers <nighteyes1993@gmail.com>