PDFBOX-2213: NPE from PDFBOX-122

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1615729 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-538: Patch for CryptographyException on Adobe Distiller generated file, thanks to Luc Claes

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1615733 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-1268: OutOfMemory Error because of huge colors

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1615744 13f79535-47bb-0310-9956-ffa450edef68