built out messages#create. add datetime to new messages form
edit rake task assignments:initiate
Move text message actions to message model
Add choice_id to answers table
Add migration to move order from messages to questions. Add sent_at column to messages.
Add current assignment and current question to students table
Add next_question method in student model
Spencer refactoring
Set student_assignment to completed when next_question returns nil
Add correct_answer column to questions
Refactor messages_controller
Add incomplete assignments methods
Include list command to return incomplete assignments
Fix incomplete assignment messaging feature in the assignment response handler
Complete basic sequential question functionality. Also add ability to switch assignment
Merge pull request #5 from scottluptowski/add-messages-model

Add messages model