Added configuration

ADDED:
 - Start serverstatus with parameter --config or -c to get into
configuration mode
 - run configuration without the need to edit the .conf file and
without learning its syntax; just answer a couple of questions and the
configuration will be done!

FIXED:
 - this makes calling vim from inside the program unnecessary: Closed #8

NOTE:
 - tested on FreeBSD only. Might require to be run as root or sudo