v0.1.7: make Value() return driver.Value instead of interface{} to satisfy Va…

…luer interface

v0.1.6

Make Deck satisfy the sql.Scanner interface

v0.1.5: Add Remove() method to remove a card from a deck. Add unit tests for …

…Remove and for Copy.

v0.1.4

If deck is nil, then Copy should return a nil Deck

v0.1.3

Change Card.Marshal* methods to not use pointer receiver