Add "more demo students mode" to seed task
Add "more demo students mode" to seed task

+ This is meant to be a simple way to branch the seed data so we can use it for two different purposes:
  1. On Heroku, keep the number of records small so we can stay under database limits for free tier
  2. Locally, if we need to work on a feature that's school-wide and want a realistic amount of records (for, e.g. optimizing back-end queries or seeing how the UI looks with lots of records) -- we can tell the seed task to make more students
+ Aiming to roughly resemble the student counts at the Healey school: ~600 students and ~30 homerooms

studentinsights/studentinsights,studentinsights/studentinsights,studentinsights/studentinsights,studentinsights/studentinsights