added Trades model
first pass for recording trades in a database
remove empty parse_feed
removed length
sqlite seems only to want python datetime objects
added model entries for all of the trade attributes
commented out mstore which gets me an error
fixed import spelling error
deleted unecessary comment
filter out duplicate trades from the api
filter trade api with exists()
uncomment mstore lines
Merge pull request #2 from skalawag/master

record trades on btce