Update statement_analysis.sql

rows_scanned -> rows_examined 
adding first_seen, last_seen, db
adding rows_examined_avg
Update statements_with_errors_or_warnings.sql

adding schema_name, first_seen, last_seen
Update statements_with_full_table_scans.sql

adding db, rows_sent_avg, rows_examined_avg, first_seen, last_seen
Update statements_with_errors_or_warnings.sql
Update statements_with_runtimes_in_95th_percentile.sql

adding db, rows_examined_avg, first_seen, last_seen
adding db, first_seen, last_seen
adding db, first_seen, last_seen
adding db, first_seen, last_seen
Merge pull request #6 from aadant/master

Merge changes from Arnaud Adant to add schema to statement views, as well as first and last seen, and a couple of extra stats.