let vcmiserver handle commandline options first

The vcmiserver application will first try to initialize various things
before parsing the commandline arguments. This leads to the program only
outputting an initialization error when it cannot initialize instead of
parsing arguments like --help. This patch moves the argument parsing to
earlier in program execution to avoid this behaviour.
Merge pull request #38 from josch/vcmiserver-handle-options-first

let vcmiserver handle commandline options first