PDFBOX-2149: Font Refactoring, Phase 1: TTF

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1603633 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2145: Clean up TextPosition

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1603637 13f79535-47bb-0310-9956-ffa450edef68