source: CIVL/mods/dev.civl.com/notes/addNewOption.txt@ 1aaefd4

1. edit grammar/Command.g4: add the new option in the rule OPTION_NAME;

2. in civl.config.IF.CIVLConstants: 
(1) add the new Option object:
    e.g.: public final static Option showTransitionsO = 
    Option.newScalarOption("showTransitions", BOOLEAN, "print transitions", false); 
(2) modify the method getAllOptions by adding the new option 
    to the return array 

3. in civl.config.IF.CIVLConfiguration: 
(1) add a new field to store the value of the new option, e.g., 
    private boolean showTransitions = false;
(2) add a line in the constructor to initialize the value of 
    the new field from GMCConfiguratio, e.g.,           
    this.showTransitions = config.isTrue(CIVLConstants.showTransitionsO);
(3) add getter and setter for the new field.

3. edit the static code in civl.run.common.CIVLCommand.java: 
add it to CIVLCommand's option categories as it should be, 
for example, "traceO" is only applicable to replay command so just add it 
by CIVLCommand.addReplayOption(...).