PDFBOX-2367: Use un-mapped glyph names when accessing AFM metrics

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1626354 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2366: Allow text adjustments to be easily overridden

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1626355 13f79535-47bb-0310-9956-ffa450edef68