fix for missing base query classes
boolean columns like "has_foo" get a hasser method "hasFoo()"
Merge pull request #593 from gharlan/hasser-methods

boolean columns like "has_foo" get a hasser method "hasFoo()"
Merge pull request #538 from gharlan/missing-base-query-classes

Missing parent Query class
Fixed #475 - MySQL Migration bug with indices
Fixed #483 - nested set orderByLevel
Fixed #500 - table prefix gets added to the class name
use IteratorAggregate for Collections, so nested iterations are possible