Cleanup

[rogerhu]

• Add constants

• Delete perms=delete (do you know what this was for?)

@nesquena

[nesquena]

IIRC, perms=delete or perms=write is a required flag on the FlickrAPI which had to be set when getting the access token if you wanted to be able to write/delete data. Without that, uploading photos on Flickr used to fail. Is there some cleaner (and easy to add) way to be able to add custom query params to the authorization URL? And/or we could just ignore this problem since uploading photos to Flickr is now not as core as it once was to the course. But I can imagine adding extra query params might be needed for other APIs as well. Will merge this for now.

[rogerhu]

That sucks. :) Just modified FlickrApi for ScribeJava to allow these permissions:

scribejava/scribejava#763

The syntax would then be new FlickrApi("delete") instead of FlickrApi.instance()