mod. use project map from config/settings
mod. blocks_user_map_query now takes 'project' parameter
rm. DB_MAP structure.  Replaced by PROJECT_DB_MAP in config/settings.
add. Method get_latest_cohort_id.
rm. ref to 'MEDIAWIKI_DB_INSTANCE' in favour of cohort meta instance from settings.
add. Method generate_test_cohort to help with building test cohorts from other projects.
mod. Make _format_mediawiki_timestamp a class method.
add. Method generate_test_cohort_name to generate a formatted test cohort name.
add. Write to usertags[_meta] tables after generating test cohort.
mod. Updated settings vars.
mod. logging. move query defs out of methods (to be moved out of module).
add/mod. delete_usertags and delete_usertags_meta methods.  pep8.
mod. Use MW_TIMESTAMP_FORMAT sting for formatting timestamps.
add. changelog update.