deprecated validation attributes VLD, AUTO_LENGTH_VLD and AUTO_TYPE_VLD, introduced new attribute ATTR_VALIDATE

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- Modified the length validation to skip validation for integer fields. The length of integer fields represents the number of bytes and is used for table creation (4 = INT, ect.)

Ticket: 254

Both default to TRUE. If set to false, you need to explicitly specify "length" and/or "type" in the parameter of hasColumn that specifies the validators for that column.

Necessary changes to the validation components. Further improvements and docs will follow in the next days.
Ticket: 150

- validators codes are now string instead of integers (constants)
- validating is now handled in record level
- added new component Doctrine_Validator_ErrorStack
- new methods Doctrine_Record::isValid() and Doctrine_Record::getErrorStack()
- errorStack now as a record instance variable

Changed ValidatorUSState to conform to the standard Doctrine_Validator_* naming scheme and removed the old style from Doctrine_Validator

removing the closing PHP tags form all php files, it\'s not needed and can break sessions which are whitespace sensitive