PDFBOX-2407: Preflight - Check sparation color spaces for device-independance

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1634647 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2405: Preflight - Don't check standard 14 fonts for missing fields

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1634653 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2423: Change name of  PDPageTree#getInheritedAttribute as suggested by Maruan

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1634679 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2423: Change type of getCount() as suggested by Maruan

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1634680 13f79535-47bb-0310-9956-ffa450edef68
PDFBOX-2423: Refactor PDAppearanceDictionary entries

git-svn-id: https://svn.apache.org/repos/asf/pdfbox/trunk@1634701 13f79535-47bb-0310-9956-ffa450edef68