Framework for price storage
Make price store create basic sqlite database
Remove extraneous semicolon

(Silly C/JS habits!)
Only create price table if it does not exist
Actually save prices into the store
Load prices from the price store

And fix other bugs, expanding the testcases as we do so, so we can now
save and load data!
Add NOT NULL constraints to the database schema
Store the price "data" dictionary in the database
Merge branch 'develop' into pricestorage

Conflicts:
	price.py
Store database prices as DECIMALs, FLOATs
Merge branch 'pricestorage' into develop