#254 Extend the Command Line Interface

[Michael Carden]

Currently, Xena can be started with:
java -jar xena.jar --help
usage: xena
-f,--file <arg> Input files
-h,--help Print usage information
-o,--outputDirectory <arg> Output directory
-p,--pluginsDirectory <arg> Path to plugins directory

It might be nice to extend that to offer options for setting the paths to things like flac and OOo - and pretty well any of the GUI options. In addition, the ability to read all of those parameters from a config file would be nice to give a fully featured No GUI xena experience.