Twitch TV fix for jumpy 0.2.4:

    Place 'rtmpdump-jtv.groovy' in your pmsencoder scripts folder and remove/rename any
    existing 'rtmpdump.groovy' found there.
 
    Note: For the location of your pmsencoder scripts folder check the 'pmsencoder.script.directory'
    setting in PMS.conf.  If there is no such setting then create a 'pmsencoder' directory in your PMS
    Program folder and place the script inside it.
