add Query\Mysql\Select with SQL_CALC_FOUND_ROWS and other mysql-specific flags
minor refactoring
pull upstream
add duplicate flags settings and flag unset tests
add Query\Mysql\Insert with IGNORE and other mysql-specific flags
flags support for Query\Mysql\Update - IGNORE and LOW_PRIORITY
add Query\Mysql\Delete with LOW_PRIORITY and other mysql-specific flags
Merge branch 'develop' of https://github.com/MAXakaWIZARD/Aura.Sql into MAXakaWIZARD-develop
simplify the flags tracking, rename to getFlagsAsString(), whitespace cleanup
use $enable, not $flag, for consistency
improve test coverage