Add scale specific multiple thumbnail datastreams to the ImageThumbnailFile object.
New and enhanced thumbnail generation now working for ImageMasterFile's only.
Add a less crappy test pdf.  Also gets thumbnail generation working for PDF files.
Working word -> pdf -> thumbnail conversion.
Adds an 85 * 85 dimension thumbnail that always gets created.
Clean out unneeded puts statements.
Remove the transformations library.
Remove the transformations spec.
Fixes the word -> pdf -> thumbnail creation chain.
Eliminate the atomistic characterization job spec for now, it's mostly testing derivative creator responsibilities anyhow.
Tests for the derivative creator and some abstractions
Exclude tests over service objects from the smoke_test rake task.  They're slow.
Merge pull request #197 from nu-lts/feature/more_thumbnails

Feature/more thumbnails