Merge pull request #12 from mihi-tr/master

New Results data
created core results table and csv import
RAML: results endpoint response updated.
Update elections-api.html.
Move SQLDatabase to db subpackage.
/results endpoint model.
Added party abbreviations
build_init_script now replaces Results placeholder as well.
Move create_ddl_temp.sql changes to create_ddl.sql.
ETL: Use consistent placeholders for municipality and results data.
Extract UnderscorizeFieldNameSerializer.
/results endpoint.