converts tiff and psd photo submissions to jpeg

[ssempervirens]

Status

this code should work, but cannot test because I can't set up a mock S3 bucket (open issue #171)

Description of Changes

Fixes #369 .

Changes proposed in this pull request:

• Converts tiff and psd file submissions to jpegs

Notes for Deployment

Screenshots (if appropriate)

Tests and linting

[x] I have rebased my changes on current develop

[ ] pytests pass in the development environment on my local machine

[ ] flake8 checks pass

[b-meson]

@magpiewings and I are taking a look at the tests and I think adding a new key to config.py is not the right way of doing this. thinking of a line like this if allowed_file.extension == '.psd' or allowed_filed.extension == 'tiff': on line 481 inviews.py` is a better way of doing this.

[ssempervirens]

@b-meson is trying to do something similar in the same place, stripping metadata from jpegs, so we will need to discuss the best way to check file extensions