Change project submissions to be file_submission_contents
Add models for file_submission_contents and image + pdf + csv submissions
Rename code submissions to code submission contents
Rename code submission to code_submission_content
Change code submissions to be associated with project_submissions
Rename submissions to project_scores
Add evaluation models
Move code submission content + evaluation into correct folder
Move evaluation outside the evaluations folder
Annotate submission_cotnents models
Create project submissions
Add classes for pdf and csv submissions
Rename submissions to project_scores
Annotate lots of models related to submissions
Projects have many project_scores
Move project_submission class to submission_contents
Create and annotate the project_submission model
Add relationships to project_submissions
Rename the uploader correctly
Add migration to convert all code submission contents over