Completed TODO
Adding methods to request groups of cites from crossref
Refactoring how I handle lookups for crossref and cottage labs.  Cited Articles are now being processed in batches
Fixing typo
Name of route correction
Fixing parameter type
Don't pass null DOIS to cottage labs
The cross ref service should return nulls now
Removing cottage labs service (not needed) and batching cross ref requests to reduce network time outs
Fixing range of batch size
Fixing bad structure in the JSON response object
Fixing bad structure in the JSON response object
Making sure we don't overstep array bounds
Logging improvement
Fixing a few minor issues with the cottage labs response JSON
Changes for the new cottage labs API and a refactor of crossref