db:migrate
tag and tagging models
relationships
debugger gem
tag tests and abilities
custom cancan matcher to avoid deprecation warnings
add modules to tag and tagging
more tag tests
remove modules for now and stub standard_copy
tagging tests
update db constraints
add source
force tag name to lowercase
refactor tests to avoid the DB
refactor and update tests for change in requirements
refactor tag and tagging tests
update tag abilities for changed requirements
Merge branch 'develop' into 473_question_tags and resolve conflicts

Conflicts:
Gemfile.lock
app/models/ability.rb
app/models/question.rb
db/schema.rb
Revert "Merge branch 'develop' into 473_question_tags and resolve conflicts"

This reverts commit 8242c9eab3cd1e2e983fd645247646332012ec41.
Merge branch '473_question_tags' into develop

Conflicts:
	Gemfile.lock
	app/models/ability.rb
	app/models/question.rb
	db/schema.rb