Cleaning up Java compiler warnings
Merge pull request #482 from ajs6f/TooManyExceptions

Cleaning up Java compiler warnings
Extract a FedoraBinary interface/impl out of FedoraDatastream
Simplify DatastreamService and ObjectService contracts
Remove NodeService#findOrCreateObject
Remove unused methods from NodeService
Remove unused methods from RepositoryService
Move deleteObject() from NodeService to an instance method of FedoraResource
Pull FedoraNodes @Context parameters from methods to the class
Pull FedoraContent @Context parameters to the class level