Add support for APEX Debug mode

[martindsouza]

When in an APEX application if DEBUG is enabled, set Logger into debug mode as well. This would need to be a configurable option.

Some thought needs to be put into this since may want to control this at various levels like schema, or app level. Also need to think about how we'll do this. Odds are with client_id, but then need to detect if client_id has already been set etc.