Add "date_trunc" function (only with 'day')

Avoid incorrect reads in iterators of TransactionMap

Move tests added in 821117f1 to a proper place

Support getObject(?, Class) in generated keys

The ResultSet returned by Statement#getGeneratedKeys() does not support
getObject(int|String, Class) unlike a normal ResultSet which does.

Optimize arguments for MVMap.init()

Fix table borders in PDF and other changes

Fix some grammar descriptions and ALTER TABLE DROP COLUMN parsing

Fix building of documentation and use modern names of Java versions