sqlite does not seem to allow using boolean values in select query

should be tested for all dbms not only cubrid even if the problem may
not exist in all of them it is good to verify that.

both do not support unsigned integers

http://www.yiiframework.com/forum/index.php/topic/48359-inserting-nulls/page__view__findpost__p__226019

fixes #877

Control statements based on the if and elseif constructs must have a single space before the opening parenthesis of the conditional and a single space after the closing parenthesis.

as requested in issue #1084

closes #1084

fixes #991

Added intl check to tests, better error reporting, credited Aura.Intl for the most complex test pattern