PDF-663 fixed a concurrency issue when loading shared page resources that can streams encrypted with crypt filters.

git-svn-id: http://anonsvn.icesoft.org/repo/icepdf/trunk/icepdf@38250 1de00972-ac04-4911-a46b-06793c8d78d9
PDF-666 correct some small dictionary parsing issues with the file in question.

git-svn-id: http://anonsvn.icesoft.org/repo/icepdf/trunk/icepdf@38253 1de00972-ac04-4911-a46b-06793c8d78d9