Rename to Item_Test because helpers are no more.
Improve GD to be more granular in its function checking.

Ref:
  http://dev.kohanaframework.org/issues/4735
  https://github.com/kohana/image/pull/11
Merge branch 'kohana_3' of github.com:gallery/gallery3 into kohana_3
Initialize $ops in generate().
Updated to Kohana 3.3/develop branch at
https://github.com/kohana/kohana/commit/af7ce3d6336faa527c612ba2aada633009ed0490
Fix an assertion.  assert_false in the old test framework would not
match null.  All tests in this test case pass!