Made this unit an authority on what strings mean.
Changed how help is used. Only --help will show long message.

Also using string decoder function for loglevel.
Implementing verification for provided dir arguments

Forcing --cgidir --staticdir and --dir to be pointed only to directories. Improved help messaging where I can. Fixed config passing to main() tobe done via pointer.
Merge pull request #56 from asergeyev/pathchecks

Changing how websocketd works with arguments that point it to directories.