Added the .gitignore files about paperworker.group.* .
Added a shell script file to boot PaperWorker in the terminal.
Changed some classes name in paperworker.core.ui.command package.
Modified some classes in paperworker.master.* packages because of above classes.
Added PWUtilities class.
Renamed the package names and class names from using 'group' to using 'organization'.
Added the function that shows command list from classpath information.