Added timestamp column to transactions table.
Merge branch 'master' of https://github.com/PheonixKotori/cube-stats into PheonixKotori-master

Added poodle's update to the transactions table.
Merge branch 'PheonixKotori-master'
Add unit test for retrieval from an empty transaction table.
Skeleton draft.py.
Implement loading of cards, but only with default ratings.
Added Trollitaire class; implemented update coefficient method.
Implemented process_deal in Trollitaire.
Implemented process_draft, added a couple validation lines to process_deal.
Implemented parse_report_file in draft.py and added unit tests.
Implemented db writes in Trollitaire; added __main__ code to draft.
Bugfix - learn how to use lists?
Fixed bug where sigma values were getting updated to mu - d(sigma). Updated associated unit test.
Enabled warning flag for deals with no picks.
Added converter for old-style drafts + unit tests
Fixed file path bug in trollconvert.