Important commit! Got data base structure working! Hardreset function implemented

Changed mongodb database structure. Now have a data base per letter of the alphabet. Each companies information is stored as a collection in the the corresponding database given by the first letter in the company's ticker symbol. For example, Apple Inc is stored in the "A" database as a collection name "AAPL". There can be several documents for each company collection. These are titled by "docoument_type". I have only put in historical data at the momment with its corresponding name as "historical_data" for the "document_type" key.