bootcd and plnode.txt causing additional confusion.

There is clearly confusion being caused by users still thinking that they need separate BootCD and plnode.txt/floppy files, when they are using the Custom, all-in-one BootCD.

I have made some changes to the myplc/db-config that sends messages, and I will make a few other changes to the GUI to provide in-line hints about what to do or download. I think there may be other sources of information causing confusion.

 Also, the bootmanager, should look on the BootCD itself first, and ignore any other node configuration files it finds... Or not?