7 hlt1 rates

• The median values for all routing bits are computed and store in a new table, measures_routingbits.
• Previous routing bit values store in the measures_runs table are not fill anymore.
• The database schema of the measures_runs table is not modified to preserve some kind of backward compatibility
• A new page in the pdf report show the Hlt1 rates and their breakdown.
• Close #7 (closed).