Feature: Import/export student list

[chrisekelley]

User story: With the school year changing we need a way to export the student list and import it later. This is also good when changing devices or backing up your student list. Perhaps the export can also include the scoring for assessments and which assessments have been completed - in case of switching tablets.

Tasks:

• [ ] Create route on client for exporting student list
• [ ] Create route on client for importing student list
• [ ] Does user need to preview the import?
• [ ] Sync this data to server.
• [ ] Store list as a doc - not on fiilesystem
• [ ] Create a new form type - 'configuration.' Support for this type in csv output. Does it need to be rendered to csv or be skipped?
• [ ] This configuration would also store scoring and which assessments have been completed per-student.
• [ ] Create query to generate the configuration export.