Updated Attribute Type to look more like the Java types supported by SQLiteORM rather than just the SQLite types.
Attribute Types now have tests around them.
Added concept of managed primary key to Attribute instead of just using Attribute Type to guess at which item is the key.
Cleaned up some of the unnecessary logic in Entity for short circuit returns.
Updated to and from string on Entity.
Updated Class Generator imports to reflect new SQLiteORM package structure.
Added AttributePaneModel in an effort to make Checkboxes work.
Updated Attribute Pane to use custom Attribute Pane Model.
Updated existing tests.