Remove Fields Various Objects Subject,Collection,Classification,Enum

enum file types -> remove marked fields
subjects -> remove marked fields
creators -> remove marked fields and add key to each json like on
subjects
locations > remove this endpoint, it is not necessary since information
is included in collection location entries
classifications -> remove marked fields and add key to each json like on
subjects
collections ->  remove marked fields  and put in ID of PrimaryCreator
(find ID linked Creator where PrimaryCreator = 1 and set it as value of
PrimaryCreator)
Remove Location Endpoint
Merge pull request #30 from mindking/master

Remove Fields Various Objects Subject,Collection,Classification, Creators, Enum