Update 20_calc_sprocs_summary.sql
Update 20_sprocs_evaluate_total_performance_last_hour.sql
Update 20_sprocs_evaluate_performance_last_hour.sql
Merge branch 'patch-18' of github.com:sstirbu/PGObserver into sstirbu-patch-18

Conflicts:
	extra_features/timeline_analysis/20_sprocs_evaluate_performance_last_hour.sql
Merge branch 'sstirbu-patch-18'