Use records.EDITOR_GROUP constant in editors hadling

Issue edina/fieldtrip-cobweb-project#14
Use editorGroup annotation for uploading the records to each group

Issue edina/fieldtrip-cobweb-project#14
Show upload button for the anonymous user
Issue edina/fieldtrip-cobweb-project#14
Fix animation only start after check editorGroup
Issue edina/fieldtrip-cobweb-project#14
Add comments to the tests
Merge pull request #11 from edina/cobweb

edina/fieldtrip-cobweb-project#10: add download functionality for downlo...