stub out url for exhibit cloning
initial update to inspect to incldue clone buttons, user login logic and widget consistency
adding link to refresh data source
fix serializing without a data profile, move clone stubs to upload
clone works
build a custom range index for numeric slider
update to django-extensions 1.3.2 to get rid of deprecation warnings
change deprecated mimetype kwargs to HttpResponse to content_type
ensure update source form gets the correct context
remove view for reference, shuffle the order of some declarations
add an is_update flag to data source update context for later use by templates
bypass form for reference DS refresh, any other potential future DS types that don't need to define a form
Merge pull request #56 from LibraryOfCongress/feature/clone-me

Feature/clone me