allow all ballot types and country-level election stats
store vote summary in separate table - queries are too slow over all votes
summarized vote data sanity checked and controller updated
country and province comparisons for election data
country and province comparisons for census data, fix up frontend
remove error margins in HTML + JS
add numerators for percentage values where missing
Merge branch 'develop' into feature/national-provincial-comparison
Merge branch 'develop' into feature/national-provincial-comparison
explain what add_summary_data does
Merge branch 'feature/national-provincial-comparison' into develop

Conflicts:
	censusreporter/apps/census/static/js/charts.js