PDFBOX-3044: add *txt files to rat config
PDFBOX-3044: add *txt files to rat config

git-svn-id: c3ad59981690829a43dc34c293c4e2cd04bcd994@1713474 13f79535-47bb-0310-9956-ffa450edef68

gavanx/pdflearn,gavanx/pdflearn,joansmith/pdfbox,joansmith/pdfbox,mathieufortin01/pdfbox,mathieufortin01/pdfbox