DBInterface.execute and SQLite.execute causes confusion

[aviks]

The documentation says to use DBInterface.execute but there exists a SQLite.execute which is different, so this is an easy mistake to make. Using a different module when using this package is not obvious.

To be clear, I acknowledge that this is documented, but I've still made this mistake multiple times when using this package, so I thought an end-user experience report might be useful.

[quinnj]

That is useful; thanks. We should probably rename SQLite.execute to try and remove the confusion.