model improvements, esp in Resource, fixed up factories, some basic specs
more model specs
ReadingRepresenter spec
gemfile fixes, placeholder specs
fixes from PR comments
Merge pull request #15 from openstax/task-reorg-1-cleanup

Task reorg 1 cleanup
quick update to openstax_accounts to prevent deprecation warning
Merge branch 'master' into klass

Conflicts:
	Gemfile.lock
Updated routes to remove the school id