Make casing consistent.
get_numeric_data() should sum its data, because all its clients need it aggregated anyway.
Removed unused methods.
Consolidate faking methods.
Use the eav attribute as the source of the poll's answer.
Make it clearer that the setting of the attribute needs to be idempotent.
Get numeric data by school via annotations.
Fix indenting.
Minor refactoring.
Filter zero values at the database.
Move filter into query.
Simplify calculating percentages.
Explain the idempotence of create_attribute().
Added new method to get numeric data for all locations and created test as well
Added new support to handle cases where no eav values for a location for a certain poll
Merge branch 'master' of git://github.com/unicefuganda/rapidsms-edtrac
Don't default parameters unless we need to.
Make default return explicit.
Deleting useless teardown.
Made a test more realistic by querying a single poll.