Add support for @-codes in text.ini

I want to do be able to do something like this without having to go into the code and change the lines manually.

NodeLoggedOff: "\1_\1w\1hNode %2d: \1g%s\1n\1g logged off @DATE @TIME\r\n\1n"
NodeLoggedOnAtNbps: "\1_\1w\1hNode %2d: \1g%s\1n\1g logged on @DATE @TIME\r\n\1n"