1.4.4

* Drop custom NumberNode/ArrayNode/ObjectNode implementations, use Guava's
  Equivalence instead; this makes the code much more robust (backport from
  1.5.x)

Francis Galiegue (8):
      Implement JsonNode equivalence using Guava's Equivalence
      EnumSyntaxChecker: use the new equivalence
      EnumKeywordValidator: use the new equivalence
      UniqueItemsKeywordValidator: use the new equivalence
      JacksonUtils: provide a node factory, a mapper and an empty object node
      Replace all usages of CustomJsonNodeFactory with JacksonUtils' new methods
      Get rid of CustomJsonNodeFactory and associated classes
      Javadoc updates

Signed-off-by: Francis Galiegue <fgaliegue@gmail.com>