Support BINARY columns

Integer fields default to nullable

Remove unused code

Fix lastInsertId implementation

last_insert_id returns autoincrement column values

Merge pull request vimeo#15 from Javakky-pxv/feature/default-fetch-mode

Set default fetch style

Fix support for decimal columns with null defaults

Add code generation into the mix

Merge pull request vimeo#14 from Javakky-pxv/feature/show-index

Supports SHOW INDEX syntax

Fix formatting and simplify API

Support questionmark placeholders better