Refactor preparing for SE-186, this also resolves SE-133 mostly
Method rename, removing deprecated references
Missed spring dependency
Updating version for development release
Adding todo
Adding routes for queueing cross lookups, SE-186
New cross ref API partially implemented
Moving variabls to constants and a minor name update
Half way through refactoring code to use new crossref service
Adding new route to spring config
Changing URL to new location
Implementation to use new cross ref service SE-186
Finishing unit test for route SE-186
Adding a null check SE-186
Code cleanup SE-186
Setting queue job to be asychronous SE-186
Adding a comment for using activemq
Making the code a little more robust against empty values
FEND-878 added dois to figure viewer
Merge branch 'master' of github.com:PLOS/ambra into dev/SE-186