Improved observation filtering

roughage/models.py

roughage/static/roughage/formdefinitions/grassDrying.json

...ge/static/roughage/formdefinitions/roughageNutrition.json

roughage/static/roughage/js/nutrition.js

roughage/templates/roughage/nutrition.html

roughage/tests.py

roughage/urls.py

roughage/views.py

security/__init__.py

security/admin.py

security/middleware/__init__.py

security/middleware/check_login_middleware.py

security/migrations/__init__.py

security/models.py

security/static/security/js/crossdomainstorage.js

security/static/security/js/loginHandler.js

security/templates/security/login_form.html

security/tests.py

security/urls.py

security/views.py