more md work
added ocd mappings dir
use ocd mappings file for jurisdictions
moved geo function into state fetch
added mappings dir and clear_cache function to base fetch
added county-level files to fetcher
create mappings.json file on instantiation
load filename mappings
moved update_mappings to base fetcher
md fetch now updates mappings
generated results filenames stored in filenames.json
added raw url to filenames.json
uncomment url retrieval
reworked mongo models
make candidate an embedded document
added Office and other minor changes
updated md mappings
make fetch runner able to accept passed-in files
base loader
started md loader