PDFBOX-2380: Simplify custom GlyphList use for toUnicode

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1627702 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2380: Added Adobe glyph lists

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1627703 13f79535-47bb-0310-9956-ffa450edef68