Cmdline parsing 

This pull request adds full featured commandline parsing, which allows for specifying arbitrary FUSE options on the and has some dedicated options for common FUSE options.

The default is now to daemonize (move into background and detach from shell) the process.  This moves copy-fuse inline with other fuse applications.  The standard way of telling the FUSE application to remain in the foreground  is with the '-f' option.

The last commit also re-enables some debug logging along when the FUSE debug logging is turned on.  The logging could stand some more work.  But I think it should be fine to commit since its only turned on along with other debug logging (not by default).