Fix test when checking foreign keys in testcases
Split the views from the nutrition app into individual files

--HG--
rename : wger/nutrition/views.py => wger/nutrition/views/ingredient.py
rename : wger/nutrition/views.py => wger/nutrition/views/meal.py
rename : wger/nutrition/views.py => wger/nutrition/views/meal_ingredient.py
rename : wger/nutrition/views.py => wger/nutrition/views/plan.py
rename : wger/nutrition/views.py => wger/nutrition/views/unit.py
rename : wger/nutrition/views.py => wger/nutrition/views/unit_ingredient.py
Show selected units of ingredients on nutritional plan
Add some more ingredients
Fix typo
Fix path, the static URL does not have a language prefix
Do a usual redirect after processing a form on a modal dialog

There seems to be problems sometimes when using the old technique and
bootstrap's menu bar (drop downs won't open).
Add more checks to the base testcase
Rewrite the tests using the more compact base testcase
Add a test to check the correct order of sets are preserved on a workout
Simplify exercise testcase (same result for aministrator and regular user)
Rewrite the tests using the more compact base testcase
Merge
Readout the current URL before trying to redirect to it
Activate the middleware for simple clickjacking protection
Add search field to ingredient overview
Fix GET parameter generation