Merge branch 'Diet_layout' into 'develop'

backend/secfit/diets/admin.py

backend/secfit/diets/migrations/0001_initial.py

backend/secfit/diets/migrations/0004_auto_20210315_1817.py

backend/secfit/diets/models.py

backend/secfit/diets/permissions.py

backend/secfit/diets/serializers.py

backend/secfit/diets/urls.py

backend/secfit/diets/views.py

backend/secfit/secfit/settings.py

backend/secfit/seed.json

frontend/package-lock.json

frontend/package.json

frontend/platforms/browser/config.xml

frontend/www/diet.html

frontend/www/myathletes.html

frontend/www/mycoach.html

frontend/www/scripts/diet.js

frontend/www/scripts/exercises.js

frontend/www/scripts/mealtype.js

frontend/www/scripts/myathletes.js