better labels for sorting
Logging/mail changes

* use variable ${PATH_TO_LOG} to store (error) output files
* use variable ${LOG_EMAIL} to send error and succes mail to
* send error/log as attachment (hope it works)
check if files exist before removing tables and create new aggregates
New model iicd

* no questionnaire hierarchy (dimension: questionnaire, question,
answer)
* two country indicators from socindev
* measures: average, respondent