#100 [ENTITY] NEW: Implementation multi check/validation

[Oleh Hapon]

<checks>
<check error-type="error" message="Value must be not empty" value="NotEmpty">
<check error-type="error" message="Size of string must be 10" value="Size(10)">
</check></check></checks>

<validations>
<validation error-type="error" message="Value must be not empty" value="NotEmpty">
<validation error-type="error" message="Size of string must be 10" value="Size(10)">
</validation></validation></validations>