drop tables in seperatete file and step.
adjust database model

* keys in dimension to higher hierachy level (question -> questionnaire)
* update/delete rules to cascade (if you delete a questionnaire, all
information (except stage-lookup tables) is deleted
* adjust layout
layout changes
get variables from config file defined by parameter config-file

usefull voor commandline execution (kitchen)
several adjustments

* keys in dimension to higher hierachy level (question -> questionnaire)
* update/delete rules to cascade (if you delete a questionnaire, all
    information (except stage-lookup tables) is deleted
* no create table if not exists, tables are dropped in seperate sql

* sql is now direct output from architect (no cleanup to do)
lookup_answer_label question_key may be null (string,numeric, cpt answers)
handling of key to other dimension