Merge pull request #46 from adam-vessey/7.x

Allow use of all FedoraObjects in derivative processing.
Change to attempt to reconstruct JP2 derivative with the -no_palette flag set if kakadu warns us about it.
Merge pull request #47 from jordandukart/7.x

Change to attempt to reconstruct JP2 derivative with the -no_palette fla...
Fix logic to allow changing of Kakadu parameters.