Issue #6 Add a separate last releases table: rename DbalGateway
RequestCounts methods
- DbalGateway::insertOrUpdateCounts added
	::createWith renamed to ::createRequestCountsWith now protected,
expects $counter column name instead of $loginSucceeded boolean
	::incrementColumnWhereId renamed to ::incrementCountWhereId, now
protected
	::getIdWhereDateAndUsernameAndIpAddressAndCookie renamed to
::getCountsIdWhereDateAndUsernameAndIpAddressAndCookie
		now protected
	::updateColumnWhereColumnNullAfterSupplied renamed to
::updateCountsColumnWhereColumnNullAfterSupplied
- ::registerAuthenticationSuccess, ::registerAuthenticationFailure
factored out ::insertOrUpdateRequestCounts