Usage message should display all command line options

[jessek]

The current usage messages are limited to 22 lines of text--the default size of a Win32 command prompt window. Without access to the HASHDEEP.TXT file, users can't get a full help message. There's no Win32 equivalent to 'man hashdeep'. The -h option should include all of the command line options. Another option, expand the -hh mode to display all options.