Upload lesson plans from csv

[emgeier]

Is someone wants to enter a bunch of lesson plans into the database at once from a csv file, we can enable that by

1. creating a upload by csv button on the upload page
2. loop through the csv to enter lesson plan metadata into the DynamoDB table
3. create a pdf from the metadata and put it in the s3 bucket for visual consistency in search results.

Alternatively, we could rework the current set up to allow more input and output formats, with lambda converters triggered by user choices, with no pdfs stored-- expand the DynamoDb schema to include all fields in lesson plan. That would make all fields searchable.