Complete StockQuoteHistory.__iter__ tests.
Custom JSON Encoder to support types that json.dumps() does not recognize
Changes to add IndexedStockQuoteHistory, implements StockQuotes class but draws the next quote from an indexed StockQuoteHistory file and saves index state between each get_quote().
This is to facilitate testing of an application that runs periodically (cron?) and calls get_quote() once, each time it runs.
Merge branch 'master' of https://github.com/Forrestjohnston/finance
Conflicts:
	finance/tests/test.properties
	finance/tests/test_historicQuotes.py