_db_column_config moved into SQLModelAdapter
No need to pass in instance to instance method hooks
Remove debug code
Work around RubyMotion 1.32 respond_to? bug.

Intermittently, respond_to? returns true when it should not be.
Set MOTION_MODEL_FMDB in project or ENV to enable FMDB. Must rake clean!

RubyMotion apparently is not recomipling properly based on the variable change.