Commit #21

PermissionHandler:
  + added others
  + added JOB_SET
  + added JOB_SET_OTHERS
Job:
  + added setProperty(String, String)
  + added firePropertyChange(String, Object, Object)
  + added addPropertyChangeListener(PropertyChangeListener)
  + added addPropertyChangeListener(String, PropertyChangeListener)
CmdJob:
  + added set(JustJobsPlugin, CommandSender, String[])
  * updated remove(JustJobsPlugin, CommandSender, String[])
  * updated jobCommand(JustJobsPlugin, CommandSender, String[])