PDFBOX-2852, PDFBOX-3030: set Maven 3.0.0 as minimum requirement
PDFBOX-2852, PDFBOX-3030: set Maven 3.0.0 as minimum requirement

git-svn-id: c3ad59981690829a43dc34c293c4e2cd04bcd994@1719858 13f79535-47bb-0310-9956-ffa450edef68

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