README normalization
interim paged pdf derivitive work
Add in checks, so orphaned pages will not explode.
Merge pull request #53 from adam-vessey/7.x-UMKC-53

Add in checks, so orphaned pages will not explode.
repackaged
aggregate pdf derivative working
not nuking ocr rel in derivative step
Merge pull request #55 from ajstanley/7.x

repackaged
code de-duplication
added library paged object derivative callback
bad Will copy paste
Merge pull request #56 from willtp87/7.x.derivative_rels

7.x.derivative rels
Merge pull request #49 from ruebot/7.x

README normalization
Check for the existance of the pages book before updating the books, thumbnail,
as pages may be ingested before the book.
Merge pull request #57 from nigelgbanks/7.x-derivative-fail-if-book-is-not-present

Check for the existance of the pages book before updating the books, thu...