add an Exercise Task supporting multiple formats
update task count
add an AnswerStore for exercise questions
remove cache and use Stores for tasks
add tests for task store
move ajax call into api
add AnswerStore tests
exercise styling
add unit tests for Exercise and question types
add test for InteractiveTask
typo in spec name
test reading assignment
debugging
pin version of flux-react
update to flux-react 2.2.0
Merge pull request #1 from openstax/exercise-task

add an Exercise Task supporting multiple formats