Some fixes for validators:
* Minor typo in an error message in ComparableRangeValidator
* Change the comparison logic in IntRangeValidator to use BigInteger for
  all compares, so that hugely out-of-range values will be correctly
  flagged (esp. for the default min/max of Integer.MIN_VALUE or MAX_VALUE)
* Clone IntRangeValidator to a new LongRangeValidator.


git-svn-id: https://svn.apache.org/repos/asf/pivot/trunk@1587287 13f79535-47bb-0310-9956-ffa450edef68