Create LabelSet model the right way.

[#46033489]
setup default permissions for LabelSets
Whitespace in activity.rb
Mark LabelSets as children of the activity
Try to get a "new for activity" link for LabelSets
Removes a lot of noise from guard [#46934579]

Most of the helpers are blank, but there are still pending tests for all of them. Commenting those pending tests takes their messages out of the all-specs feedback from Guard, making it easier to see what else is going on.
Valiant attempt, but rspec testing of Hobo controllers isn't practical.

[#46934579]
Label set model unit tests [#46934579]
Use Faker.
Catching up a little unit-testing tech debt
Creates and initially tests the "Label" object in the data model.

[#46042907] There is still a bit of testing to verify that label_sets hash properly when they own labels, and then the relevant views.
Testing for label sets with labels

[#46042907]
Labels controller, adding them to LabelSet page

[#46042907]
WIP on adding Labels to LabelSets

[#46042907]
Almost able to manage Labels within LabelSet form.
Merge branch 'master' into wip-label-sets

Conflicts:
	app/controllers/label_sets_controller.rb
	app/models/label_set.rb
	db/schema.rb
	spec/controllers/label_sets_controller_spec.rb
	spec/helpers/label_sets_helper_spec.rb
	spec/models/label_set_spec.rb
Rename 'Label' to 'GraphLabel'

Speculative fix - is there a name collision in Hobo with the 'Label' model which is causing my headaches?
Bug fixes to make label sets work with labels.
Merge branch 'master' into staging