* Add integrity command
* Add structures and implementation for basic referential integrity check
* Use a channel to receive integrity check reports as they generates
* Setup unit testing
* Add confirm prompt to integrity command and make verbose output optional
* Add more integrity checks
* Use wrapper functions to simplify behaviour and tests
* Improve extensibility of IntegrityCheckResult
* Improve CheckIntegrity tests performance
* Use a config structure for relational integrity checks
* Add more relational integrity checks
* Add more checks and do some cleanup
* Add more relational integrity checks with proper tests
* Fix tests to use sync functions
* Add more info to integrity command help
* Add more relational integrity checks
* Add more relational integrity checks
* Add missing checks
* Show more information about missing records
* Fix to use new sync function
* Change integrity check functions to accept a SqlSupplier
* Fix code duplication
* Use squirrel for query building
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