Transfer draft3 tests which need no changes for draft4
Update required test for draft4
Update type test for draft4
Copy maximum test from draft3 to draft4
Convert divisibleBy test to multipleOf for draft4
Convert 'disallow' test to 'not' test for draft4
Convert 'extents' test to 'allOf' test for draft4
Convert 'edpendencies' test for draft4
Add another test to dependencies
Copy additionalItems and additionalProperties tests from draft 3 to 4
Copy optional tests from draft 3 to 4
Add test for definitions
Add test for anyOf
Add test for oneOf
Add min/maxProperties tests
Ready the schema sanity checker for versions other than draft3
Fix additionalItems tests whose schemas were invalid in draft4
Fix min and maxProperties tests.
Fix oneOf test schema
Switch definitions tests to be metavalidation tests
Add more format tests to draft4 suite